TY  - JOUR
AU  - Ho, Hsin-Chia
AU  - Smiljanić, Milutin
AU  - Jovanović, Zoran M.
AU  - Čekada, Miha
AU  - Kovač, Janez
AU  - Koster, Gertjan
AU  - Hlinka, Jiří
AU  - Hodnik, Nejc
AU  - Spreitzer, Matjaž
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11587
AB  - Development of a robust photocathode using lowcost and high-performing materials, e.g., p-Si, to produce clean fuel hydrogen has remained challenging since the semiconductor substrate is easily susceptible to (photo)corrosion under photoelectrochemical (PEC) operational conditions. A protective layer over the substrate to simultaneously provide corrosion resistance and maintain efficient charge transfer across the device is therefore needed. To this end, in the present work, we utilized pulsed laser deposition (PLD) to prepare a high-quality SrTiO3 (STO) layer to passivate the p-Si substrate using a buffer layer of reduced graphene oxide (rGO). Specifically, a very thin (3.9 nm ∼10 unit cells) STO layer epitaxially overgrown on rGO-buffered Si showed the highest onset potential (0.326 V vs RHE) in comparison to the counterparts with thicker and/or nonepitaxial STO. The photovoltage, flat-band potential, and electrochemical impedance spectroscopy measurements revealed that the epitaxial photocathode was more beneficial for charge separation, charge transfer, and targeted redox reaction than the nonepitaxial one. The STO/rGO/Si with a smooth and highly epitaxial STO layer outperforming the directly contacted STO/Si with a textured and polycrystalline STO layer showed the importance of having a well-defined passivation layer. In addition, the numerous pinholes formed in the directly contacted STO/Si led to the rapid degradation of the photocathode during the PEC measurements. The stability tests demonstrated the soundness of the epitaxial STO layer in passivating Si against corrosion. This study provided a facile approach for preparing a robust protection layer over a photoelectrode substrate in realizing an efficient and, at the same time, durable PEC device.
T2  - ACS Applied Materials & Interfaces
T1  - Robust SrTiO3 Passivation of Silicon Photocathode by Reduced Graphene Oxide for Solar Water Splitting
VL  - 15
IS  - 37
SP  - 44482
EP  - 44492
DO  - 10.1021/acsami.3c07747
ER  - 

@article{
author = "Ho, Hsin-Chia and Smiljanić, Milutin and Jovanović, Zoran M. and Čekada, Miha and Kovač, Janez and Koster, Gertjan and Hlinka, Jiří and Hodnik, Nejc and Spreitzer, Matjaž",
year = "2023",
abstract = "Development of a robust photocathode using lowcost and high-performing materials, e.g., p-Si, to produce clean fuel hydrogen has remained challenging since the semiconductor substrate is easily susceptible to (photo)corrosion under photoelectrochemical (PEC) operational conditions. A protective layer over the substrate to simultaneously provide corrosion resistance and maintain efficient charge transfer across the device is therefore needed. To this end, in the present work, we utilized pulsed laser deposition (PLD) to prepare a high-quality SrTiO3 (STO) layer to passivate the p-Si substrate using a buffer layer of reduced graphene oxide (rGO). Specifically, a very thin (3.9 nm ∼10 unit cells) STO layer epitaxially overgrown on rGO-buffered Si showed the highest onset potential (0.326 V vs RHE) in comparison to the counterparts with thicker and/or nonepitaxial STO. The photovoltage, flat-band potential, and electrochemical impedance spectroscopy measurements revealed that the epitaxial photocathode was more beneficial for charge separation, charge transfer, and targeted redox reaction than the nonepitaxial one. The STO/rGO/Si with a smooth and highly epitaxial STO layer outperforming the directly contacted STO/Si with a textured and polycrystalline STO layer showed the importance of having a well-defined passivation layer. In addition, the numerous pinholes formed in the directly contacted STO/Si led to the rapid degradation of the photocathode during the PEC measurements. The stability tests demonstrated the soundness of the epitaxial STO layer in passivating Si against corrosion. This study provided a facile approach for preparing a robust protection layer over a photoelectrode substrate in realizing an efficient and, at the same time, durable PEC device.",
journal = "ACS Applied Materials & Interfaces",
title = "Robust SrTiO3 Passivation of Silicon Photocathode by Reduced Graphene Oxide for Solar Water Splitting",
volume = "15",
number = "37",
pages = "44482-44492",
doi = "10.1021/acsami.3c07747"
}

Ho, H., Smiljanić, M., Jovanović, Z. M., Čekada, M., Kovač, J., Koster, G., Hlinka, J., Hodnik, N.,& Spreitzer, M.. (2023). Robust SrTiO3 Passivation of Silicon Photocathode by Reduced Graphene Oxide for Solar Water Splitting. in ACS Applied Materials & Interfaces, 15(37), 44482-44492.
https://doi.org/10.1021/acsami.3c07747

Ho H, Smiljanić M, Jovanović ZM, Čekada M, Kovač J, Koster G, Hlinka J, Hodnik N, Spreitzer M. Robust SrTiO3 Passivation of Silicon Photocathode by Reduced Graphene Oxide for Solar Water Splitting. in ACS Applied Materials & Interfaces. 2023;15(37):44482-44492.
doi:10.1021/acsami.3c07747 .

Ho, Hsin-Chia, Smiljanić, Milutin, Jovanović, Zoran M., Čekada, Miha, Kovač, Janez, Koster, Gertjan, Hlinka, Jiří, Hodnik, Nejc, Spreitzer, Matjaž, "Robust SrTiO3 Passivation of Silicon Photocathode by Reduced Graphene Oxide for Solar Water Splitting" in ACS Applied Materials & Interfaces, 15, no. 37 (2023):44482-44492,
https://doi.org/10.1021/acsami.3c07747 . .

TY  - JOUR
AU  - Smiljanić, Milutin
AU  - Panić, Stefan
AU  - Bele, Marjan
AU  - Ruiz-Zepeda, Francisco
AU  - Pavko, Luka
AU  - Gašparič, Lea
AU  - Kokalj, Anton
AU  - Gaberšček, Miran
AU  - Hodnik, Nejc
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10503
AB  - Water electrolysis powered by renewables is regarded as the feasible route for the production of hydrogen, obtained at the cathode side through electrochemical hydrogen evolution reaction (HER). Herein, we present a rational strategy to improve the overall HER catalytic performance of Pt, which is known as the best monometallic catalyst for this reaction, by supporting it on a conductive titanium oxynitride (TiONx) dispersed over reduced graphene oxide nanoribbons. Characterization of the Pt/TiONx composite revealed the presence of small Pt particles with diameters between 2 and 3 nm, which are well dispersed over the TiONx support. The Pt/TiONx nanocomposite exhibited improved HER activity and stability with respect to the Pt/C benchmark in an acid electrolyte, which was ascribed to the strong metal–support interaction (SMSI) triggered between the TiONx support and grafted Pt nanoparticles. SMSI between TiONx and Pt was evidenced by X-ray photoelectron spectroscopy (XPS) through a shift of the binding energies of the characteristic Pt 4f photoelectron lines with respect to Pt/C. Density functional theory (DFT) calculations confirmed the strong interaction between Pt nanoparticles and the TiONx support. This strong interaction improves the stability of Pt nanoparticles and weakens the binding of chemisorbed H atoms thereon. Both of these effects may result in enhanced HER activity.
T2  - ACS Catalysis
T1  - Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
VL  - 12
IS  - 20
SP  - 13021
EP  - 13033
DO  - 10.1021/acscatal.2c03214
ER  - 

@article{
author = "Smiljanić, Milutin and Panić, Stefan and Bele, Marjan and Ruiz-Zepeda, Francisco and Pavko, Luka and Gašparič, Lea and Kokalj, Anton and Gaberšček, Miran and Hodnik, Nejc",
year = "2022",
abstract = "Water electrolysis powered by renewables is regarded as the feasible route for the production of hydrogen, obtained at the cathode side through electrochemical hydrogen evolution reaction (HER). Herein, we present a rational strategy to improve the overall HER catalytic performance of Pt, which is known as the best monometallic catalyst for this reaction, by supporting it on a conductive titanium oxynitride (TiONx) dispersed over reduced graphene oxide nanoribbons. Characterization of the Pt/TiONx composite revealed the presence of small Pt particles with diameters between 2 and 3 nm, which are well dispersed over the TiONx support. The Pt/TiONx nanocomposite exhibited improved HER activity and stability with respect to the Pt/C benchmark in an acid electrolyte, which was ascribed to the strong metal–support interaction (SMSI) triggered between the TiONx support and grafted Pt nanoparticles. SMSI between TiONx and Pt was evidenced by X-ray photoelectron spectroscopy (XPS) through a shift of the binding energies of the characteristic Pt 4f photoelectron lines with respect to Pt/C. Density functional theory (DFT) calculations confirmed the strong interaction between Pt nanoparticles and the TiONx support. This strong interaction improves the stability of Pt nanoparticles and weakens the binding of chemisorbed H atoms thereon. Both of these effects may result in enhanced HER activity.",
journal = "ACS Catalysis",
title = "Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support",
volume = "12",
number = "20",
pages = "13021-13033",
doi = "10.1021/acscatal.2c03214"
}

Smiljanić, M., Panić, S., Bele, M., Ruiz-Zepeda, F., Pavko, L., Gašparič, L., Kokalj, A., Gaberšček, M.,& Hodnik, N.. (2022). Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support. in ACS Catalysis, 12(20), 13021-13033.
https://doi.org/10.1021/acscatal.2c03214

Smiljanić M, Panić S, Bele M, Ruiz-Zepeda F, Pavko L, Gašparič L, Kokalj A, Gaberšček M, Hodnik N. Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support. in ACS Catalysis. 2022;12(20):13021-13033.
doi:10.1021/acscatal.2c03214 .

Smiljanić, Milutin, Panić, Stefan, Bele, Marjan, Ruiz-Zepeda, Francisco, Pavko, Luka, Gašparič, Lea, Kokalj, Anton, Gaberšček, Miran, Hodnik, Nejc, "Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support" in ACS Catalysis, 12, no. 20 (2022):13021-13033,
https://doi.org/10.1021/acscatal.2c03214 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Bele, Marjan
AU  - Moriau, Léonard Jean
AU  - Vélez Santa, John Fredy
AU  - Menart, Svit
AU  - Šala, Martin
AU  - Hrnjić, Armin
AU  - Jovanovič, Primož
AU  - Ruiz-Zepeda, Francisco
AU  - Gaberšček, Miran
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10146
AB  - Degradation of carbon-supported Pt nanocatalysts in fuel cells and electrolyzers hinders widespread commercialization of these green technologies. Transition between oxidized and reduced states of Pt during fast potential spikes triggers significant Pt dissolution. Therefore, designing Pt-based catalysts able to withstand such conditions is of critical importance. We report here on a strategy to suppress Pt dissolution by using an organic matrix tris(aza)pentacene (TAP) as an alternative support material for Pt. The major benefit of TAP is its potential-dependent conductivity in aqueous media, which was directly evidenced by electrochemical impedance spectroscopy. At potentials below ∼0.45 VRHE, TAP is protonated and its conductivity is improved, which enables supported Pt to run hydrogen reactions. At potentials corresponding to Pt oxidation/reduction (>∼0.45 VRHE), TAP is deprotonated and its conductivity is restricted. Tunable conductivity of TAP enhanced the durability of the Pt/TAP with respect to Pt/C when these two materials were subjected to the same degradation protocol (0.1 M HClO4 electrolyte, 3000 voltammetric scans, 1 V/s, 0.05-1.4 VRHE). The exceptional stability of Pt/TAP composite on a nanoscale level was confirmed by identical location TEM imaging before and after the used degradation protocol. Suppression of transient Pt dissolution from Pt/TAP with respect to the Pt/C benchmark was directly measured in a setup consisting of an electrochemical flow cell connected to inductively coupled plasma-mass spectrometry.
T2  - ACS Omega
T1  - Suppressing Platinum Electrocatalyst Degradation via a HighSurface-Area Organic Matrix Support
VL  - 7
IS  - 4
SP  - 3540
EP  - 3548
DO  - 10.1021/acsomega.1c06028
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Bele, Marjan and Moriau, Léonard Jean and Vélez Santa, John Fredy and Menart, Svit and Šala, Martin and Hrnjić, Armin and Jovanovič, Primož and Ruiz-Zepeda, Francisco and Gaberšček, Miran and Hodnik, Nejc",
year = "2021",
abstract = "Degradation of carbon-supported Pt nanocatalysts in fuel cells and electrolyzers hinders widespread commercialization of these green technologies. Transition between oxidized and reduced states of Pt during fast potential spikes triggers significant Pt dissolution. Therefore, designing Pt-based catalysts able to withstand such conditions is of critical importance. We report here on a strategy to suppress Pt dissolution by using an organic matrix tris(aza)pentacene (TAP) as an alternative support material for Pt. The major benefit of TAP is its potential-dependent conductivity in aqueous media, which was directly evidenced by electrochemical impedance spectroscopy. At potentials below ∼0.45 VRHE, TAP is protonated and its conductivity is improved, which enables supported Pt to run hydrogen reactions. At potentials corresponding to Pt oxidation/reduction (>∼0.45 VRHE), TAP is deprotonated and its conductivity is restricted. Tunable conductivity of TAP enhanced the durability of the Pt/TAP with respect to Pt/C when these two materials were subjected to the same degradation protocol (0.1 M HClO4 electrolyte, 3000 voltammetric scans, 1 V/s, 0.05-1.4 VRHE). The exceptional stability of Pt/TAP composite on a nanoscale level was confirmed by identical location TEM imaging before and after the used degradation protocol. Suppression of transient Pt dissolution from Pt/TAP with respect to the Pt/C benchmark was directly measured in a setup consisting of an electrochemical flow cell connected to inductively coupled plasma-mass spectrometry.",
journal = "ACS Omega",
title = "Suppressing Platinum Electrocatalyst Degradation via a HighSurface-Area Organic Matrix Support",
volume = "7",
number = "4",
pages = "3540-3548",
doi = "10.1021/acsomega.1c06028"
}

Smiljanić, M. Lj., Bele, M., Moriau, L. J., Vélez Santa, J. F., Menart, S., Šala, M., Hrnjić, A., Jovanovič, P., Ruiz-Zepeda, F., Gaberšček, M.,& Hodnik, N.. (2021). Suppressing Platinum Electrocatalyst Degradation via a HighSurface-Area Organic Matrix Support. in ACS Omega, 7(4), 3540-3548.
https://doi.org/10.1021/acsomega.1c06028

Smiljanić ML, Bele M, Moriau LJ, Vélez Santa JF, Menart S, Šala M, Hrnjić A, Jovanovič P, Ruiz-Zepeda F, Gaberšček M, Hodnik N. Suppressing Platinum Electrocatalyst Degradation via a HighSurface-Area Organic Matrix Support. in ACS Omega. 2021;7(4):3540-3548.
doi:10.1021/acsomega.1c06028 .

Smiljanić, Milutin Lj., Bele, Marjan, Moriau, Léonard Jean, Vélez Santa, John Fredy, Menart, Svit, Šala, Martin, Hrnjić, Armin, Jovanovič, Primož, Ruiz-Zepeda, Francisco, Gaberšček, Miran, Hodnik, Nejc, "Suppressing Platinum Electrocatalyst Degradation via a HighSurface-Area Organic Matrix Support" in ACS Omega, 7, no. 4 (2021):3540-3548,
https://doi.org/10.1021/acsomega.1c06028 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Bele, Marjan
AU  - Moriau, Leonard
AU  - Ruiz-Zepeda, Francisco
AU  - Šala, Martin
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10103
AB  - Palladium has attracted significant attention as a catalyst or co-catalyst for many electrochemical reactions in energy conversion devices. We have studied electrochemical stability of a commercial Pd/C sample in an acidic electrolyte by exposing it to an accelerated stress test (AST) to mimic potential spikes in fuel cells and electrolyzers during start/stop events. AST consisted of extensive rapid potential cycling (5000 cycles, 1 V/s) in two potential regions, namely AST1 was performed between 0.4 and 1.4 VRHE, while AST2 was performed between 0.05 and 1.4 VRHE. Degradation of Pd/C was monitored by the changes in Pd electrochemical surface area, while the hydrogen evolution reaction (HER) was used as a test reaction to observe the corresponding impact of the degradation on the activity of Pd/C. Significant Pd/C degradation and HER activity loss were observed in both potential regions. Coupling of the electrochemical flow cell with an inductively coupled plasma mass spectrometry device showed substantial Pd dissolution during both ASTs. Identical location scanning electron microscopy revealed that Pd dissolution is followed by redeposition during both ASTs, resulting in particle size growth. Particle size growth was seen as especially dramatic in the case of AST2, when particularly large Pd nanostructures were obtained on top of the catalyst layer. According to the results presented in this work, (in)stability of Pd/C and other Pd-based nanocatalysts should be studied systematically as it may present a key factor limiting their application in energy conversion devices.
T2  - The Journal of Physical Chemistry C
T1  - Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media
VL  - 125
IS  - 50
SP  - 27534
EP  - 27542
DO  - 10.1021/acs.jpcc.1c08496
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Bele, Marjan and Moriau, Leonard and Ruiz-Zepeda, Francisco and Šala, Martin and Hodnik, Nejc",
year = "2021",
abstract = "Palladium has attracted significant attention as a catalyst or co-catalyst for many electrochemical reactions in energy conversion devices. We have studied electrochemical stability of a commercial Pd/C sample in an acidic electrolyte by exposing it to an accelerated stress test (AST) to mimic potential spikes in fuel cells and electrolyzers during start/stop events. AST consisted of extensive rapid potential cycling (5000 cycles, 1 V/s) in two potential regions, namely AST1 was performed between 0.4 and 1.4 VRHE, while AST2 was performed between 0.05 and 1.4 VRHE. Degradation of Pd/C was monitored by the changes in Pd electrochemical surface area, while the hydrogen evolution reaction (HER) was used as a test reaction to observe the corresponding impact of the degradation on the activity of Pd/C. Significant Pd/C degradation and HER activity loss were observed in both potential regions. Coupling of the electrochemical flow cell with an inductively coupled plasma mass spectrometry device showed substantial Pd dissolution during both ASTs. Identical location scanning electron microscopy revealed that Pd dissolution is followed by redeposition during both ASTs, resulting in particle size growth. Particle size growth was seen as especially dramatic in the case of AST2, when particularly large Pd nanostructures were obtained on top of the catalyst layer. According to the results presented in this work, (in)stability of Pd/C and other Pd-based nanocatalysts should be studied systematically as it may present a key factor limiting their application in energy conversion devices.",
journal = "The Journal of Physical Chemistry C",
title = "Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media",
volume = "125",
number = "50",
pages = "27534-27542",
doi = "10.1021/acs.jpcc.1c08496"
}

Smiljanić, M. Lj., Bele, M., Moriau, L., Ruiz-Zepeda, F., Šala, M.,& Hodnik, N.. (2021). Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media. in The Journal of Physical Chemistry C, 125(50), 27534-27542.
https://doi.org/10.1021/acs.jpcc.1c08496

Smiljanić ML, Bele M, Moriau L, Ruiz-Zepeda F, Šala M, Hodnik N. Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media. in The Journal of Physical Chemistry C. 2021;125(50):27534-27542.
doi:10.1021/acs.jpcc.1c08496 .

Smiljanić, Milutin Lj., Bele, Marjan, Moriau, Leonard, Ruiz-Zepeda, Francisco, Šala, Martin, Hodnik, Nejc, "Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media" in The Journal of Physical Chemistry C, 125, no. 50 (2021):27534-27542,
https://doi.org/10.1021/acs.jpcc.1c08496 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Bele, Marjan
AU  - Ruiz-Zepeda, Francisco
AU  - Šala, Martin
AU  - Kroflič, Ana
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9979
AB  - Electrochemical stability of a commercial Rh/C catalyst has been studied in an acidic electrolyte by accelerated degradation protocols (ADP) which involved 5000 rapid voltammetric scans (1 V/s) in two potential regions: ADP1 was performed between 0.4 VRHE and 1.4 VRHE, while ADP2 was performed between 0.05 VRHE and 1.4 VRHE. Degradation of Rh/C was monitored by the changes in Rh electrochemical surface area (ECSA) and electrocatalytic activity for hydrogen evolution (HER) and oxygen reduction (ORR). Rh/C catalyst was particularly stable during ADP1 showing only a minor loss of ECSA, while its electrocatalytic activity for HER and ORR was practically unaffected, which was further corroborated with identical location SEM (IL-SEM) imaging. In the case of ADP2, severe degradation of Rh/C occurred followed by substantial decay in its electrocatalytic activity. Coupling of the electrochemical flow cell (EFC) with ICP-MS revealed much higher Rh dissolution in ADP2 than in ADP1. IL-SEM in combination with ex-situ TEM imaging showed that degradation of the Rh/C sample is not homogeneous during ADP2, as dissolution prevails on certain locations, while dissolution followed by re-deposition occurs on others. According to the results obtained in this work, Rh/C catalysts are exceptionally sensitive to the sudden potential jumps between particularly low and high values.
T2  - Electrochimica Acta
T1  - Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media
VL  - 400
SP  - 139435
DO  - 10.1016/j.electacta.2021.139435
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Bele, Marjan and Ruiz-Zepeda, Francisco and Šala, Martin and Kroflič, Ana and Hodnik, Nejc",
year = "2021",
abstract = "Electrochemical stability of a commercial Rh/C catalyst has been studied in an acidic electrolyte by accelerated degradation protocols (ADP) which involved 5000 rapid voltammetric scans (1 V/s) in two potential regions: ADP1 was performed between 0.4 VRHE and 1.4 VRHE, while ADP2 was performed between 0.05 VRHE and 1.4 VRHE. Degradation of Rh/C was monitored by the changes in Rh electrochemical surface area (ECSA) and electrocatalytic activity for hydrogen evolution (HER) and oxygen reduction (ORR). Rh/C catalyst was particularly stable during ADP1 showing only a minor loss of ECSA, while its electrocatalytic activity for HER and ORR was practically unaffected, which was further corroborated with identical location SEM (IL-SEM) imaging. In the case of ADP2, severe degradation of Rh/C occurred followed by substantial decay in its electrocatalytic activity. Coupling of the electrochemical flow cell (EFC) with ICP-MS revealed much higher Rh dissolution in ADP2 than in ADP1. IL-SEM in combination with ex-situ TEM imaging showed that degradation of the Rh/C sample is not homogeneous during ADP2, as dissolution prevails on certain locations, while dissolution followed by re-deposition occurs on others. According to the results obtained in this work, Rh/C catalysts are exceptionally sensitive to the sudden potential jumps between particularly low and high values.",
journal = "Electrochimica Acta",
title = "Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media",
volume = "400",
pages = "139435",
doi = "10.1016/j.electacta.2021.139435"
}

Smiljanić, M. Lj., Bele, M., Ruiz-Zepeda, F., Šala, M., Kroflič, A.,& Hodnik, N.. (2021). Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media. in Electrochimica Acta, 400, 139435.
https://doi.org/10.1016/j.electacta.2021.139435

Smiljanić ML, Bele M, Ruiz-Zepeda F, Šala M, Kroflič A, Hodnik N. Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media. in Electrochimica Acta. 2021;400:139435.
doi:10.1016/j.electacta.2021.139435 .

Smiljanić, Milutin Lj., Bele, Marjan, Ruiz-Zepeda, Francisco, Šala, Martin, Kroflič, Ana, Hodnik, Nejc, "Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media" in Electrochimica Acta, 400 (2021):139435,
https://doi.org/10.1016/j.electacta.2021.139435 . .

TY  - JOUR
AU  - Vélez Santa, John Fredy
AU  - Menart, Svit
AU  - Bele, Marjan
AU  - Ruiz-Zepeda, Francisco
AU  - Jovanovič, Primož
AU  - Jovanovski, Vasko
AU  - Šala, Martin
AU  - Smiljanić, Milutin Lj.
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9844
AB  - Developing a Pt-based electrocatalytic material able to selectively catalyze hydrogen oxidation (HOR) while supressing oxygen reduction (ORR) is beneficial for durability of the fuel cells. Namely, degradation of carbon supported Pt particles is dramatically influenced by the unwanted ORR enrolling at the anode due to the air penetration during start-up/shut-down events. We present an organic matrix tris(aza)pentacene (TAP), which belongs to π-functional materials with ladder-like conjugated nitrogen-containing units, as the support for Pt to form a “smart” fuel cell anode able to selectively catalyze HOR and to suppress ORR. “Switching-on/off” of the composite material activity is provided by reversible reduction/oxidation of the TAP in the low potential region which provokes TAP - HxTAP transition. Conductivity of the reduced HxTAP enables supported Pt particles to effectively run HOR. In contrast, restricted conductivity of oxidized TAP analogue leads to the substantial drop in the ORR activity with respect to benchmark Pt/C catalyst.
T2  - International Journal of Hydrogen Energy
T1  - High-surface-area organic matrix tris(aza)pentacene supported platinum nanostructures as selective electrocatalyst for hydrogen oxidation/evolution reaction and suppressive for oxygen reduction reaction
VL  - 46
IS  - 49
SP  - 25039
EP  - 25049
DO  - 10.1016/j.ijhydene.2021.05.041
ER  - 

@article{
author = "Vélez Santa, John Fredy and Menart, Svit and Bele, Marjan and Ruiz-Zepeda, Francisco and Jovanovič, Primož and Jovanovski, Vasko and Šala, Martin and Smiljanić, Milutin Lj. and Hodnik, Nejc",
year = "2021",
abstract = "Developing a Pt-based electrocatalytic material able to selectively catalyze hydrogen oxidation (HOR) while supressing oxygen reduction (ORR) is beneficial for durability of the fuel cells. Namely, degradation of carbon supported Pt particles is dramatically influenced by the unwanted ORR enrolling at the anode due to the air penetration during start-up/shut-down events. We present an organic matrix tris(aza)pentacene (TAP), which belongs to π-functional materials with ladder-like conjugated nitrogen-containing units, as the support for Pt to form a “smart” fuel cell anode able to selectively catalyze HOR and to suppress ORR. “Switching-on/off” of the composite material activity is provided by reversible reduction/oxidation of the TAP in the low potential region which provokes TAP - HxTAP transition. Conductivity of the reduced HxTAP enables supported Pt particles to effectively run HOR. In contrast, restricted conductivity of oxidized TAP analogue leads to the substantial drop in the ORR activity with respect to benchmark Pt/C catalyst.",
journal = "International Journal of Hydrogen Energy",
title = "High-surface-area organic matrix tris(aza)pentacene supported platinum nanostructures as selective electrocatalyst for hydrogen oxidation/evolution reaction and suppressive for oxygen reduction reaction",
volume = "46",
number = "49",
pages = "25039-25049",
doi = "10.1016/j.ijhydene.2021.05.041"
}

Vélez Santa, J. F., Menart, S., Bele, M., Ruiz-Zepeda, F., Jovanovič, P., Jovanovski, V., Šala, M., Smiljanić, M. Lj.,& Hodnik, N.. (2021). High-surface-area organic matrix tris(aza)pentacene supported platinum nanostructures as selective electrocatalyst for hydrogen oxidation/evolution reaction and suppressive for oxygen reduction reaction. in International Journal of Hydrogen Energy, 46(49), 25039-25049.
https://doi.org/10.1016/j.ijhydene.2021.05.041

Vélez Santa JF, Menart S, Bele M, Ruiz-Zepeda F, Jovanovič P, Jovanovski V, Šala M, Smiljanić ML, Hodnik N. High-surface-area organic matrix tris(aza)pentacene supported platinum nanostructures as selective electrocatalyst for hydrogen oxidation/evolution reaction and suppressive for oxygen reduction reaction. in International Journal of Hydrogen Energy. 2021;46(49):25039-25049.
doi:10.1016/j.ijhydene.2021.05.041 .

Vélez Santa, John Fredy, Menart, Svit, Bele, Marjan, Ruiz-Zepeda, Francisco, Jovanovič, Primož, Jovanovski, Vasko, Šala, Martin, Smiljanić, Milutin Lj., Hodnik, Nejc, "High-surface-area organic matrix tris(aza)pentacene supported platinum nanostructures as selective electrocatalyst for hydrogen oxidation/evolution reaction and suppressive for oxygen reduction reaction" in International Journal of Hydrogen Energy, 46, no. 49 (2021):25039-25049,
https://doi.org/10.1016/j.ijhydene.2021.05.041 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Petek, Urša
AU  - Bele, Marjan
AU  - Ruiz-Zepeda, Francisco
AU  - Šala, Martin
AU  - Jovanovič, Primož
AU  - Gaberšček, Miran
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9548
AB  - Electrochemical stability of a commercial Au/C catalyst in an acidic electrolyte has been investigated by an accelerated stress test (AST), which consisted of 10,000 voltammetric scans (1 V/s) in the potential range between 0.58 and 1.41 VRHE. Loss of Au electrochemical surface area (ESA) during the AST pointed out to the degradation of Au/C. Coupling of an electrochemical flow cell with ICP-MS showed that only a minor amount of gold is dissolved despite the substantial loss of gold ESA during the AST (∼35% of initial value remains at the end of the AST). According to the electrochemical mass spectrometry experiments, carbon corrosion occurs during the AST but to a minor extent. By using identical location scanning electron microscopy and identical location transmission electron microscopy, it was possible to discern that the dissolution of small Au particles (<5 nm) within the polydisperse Au/C sample is the main degradation mechanism. The mass of such particles gives only a minor contribution to the overall Au mass of the polydisperse sample while giving a major contribution to the overall ESA, which explains a significant loss of ESA and minor loss of mass during the AST. The addition of low amounts of chloride anions (10-4 M) substantially promoted the degradation of gold nanoparticles. At an even higher concentration of chlorides (10-2 M), the dissolution of gold was rather effective, which is useful from the recycling point of view when rapid leaching of gold is desirable. © 2021 American Chemical Society.
T2  - The Journal of Physical Chemistry C
T1  - Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media
VL  - 125
IS  - 1
SP  - 635
EP  - 647
DO  - 10.1021/acs.jpcc.0c10033
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Petek, Urša and Bele, Marjan and Ruiz-Zepeda, Francisco and Šala, Martin and Jovanovič, Primož and Gaberšček, Miran and Hodnik, Nejc",
year = "2021",
abstract = "Electrochemical stability of a commercial Au/C catalyst in an acidic electrolyte has been investigated by an accelerated stress test (AST), which consisted of 10,000 voltammetric scans (1 V/s) in the potential range between 0.58 and 1.41 VRHE. Loss of Au electrochemical surface area (ESA) during the AST pointed out to the degradation of Au/C. Coupling of an electrochemical flow cell with ICP-MS showed that only a minor amount of gold is dissolved despite the substantial loss of gold ESA during the AST (∼35% of initial value remains at the end of the AST). According to the electrochemical mass spectrometry experiments, carbon corrosion occurs during the AST but to a minor extent. By using identical location scanning electron microscopy and identical location transmission electron microscopy, it was possible to discern that the dissolution of small Au particles (<5 nm) within the polydisperse Au/C sample is the main degradation mechanism. The mass of such particles gives only a minor contribution to the overall Au mass of the polydisperse sample while giving a major contribution to the overall ESA, which explains a significant loss of ESA and minor loss of mass during the AST. The addition of low amounts of chloride anions (10-4 M) substantially promoted the degradation of gold nanoparticles. At an even higher concentration of chlorides (10-2 M), the dissolution of gold was rather effective, which is useful from the recycling point of view when rapid leaching of gold is desirable. © 2021 American Chemical Society.",
journal = "The Journal of Physical Chemistry C",
title = "Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media",
volume = "125",
number = "1",
pages = "635-647",
doi = "10.1021/acs.jpcc.0c10033"
}

Smiljanić, M. Lj., Petek, U., Bele, M., Ruiz-Zepeda, F., Šala, M., Jovanovič, P., Gaberšček, M.,& Hodnik, N.. (2021). Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media. in The Journal of Physical Chemistry C, 125(1), 635-647.
https://doi.org/10.1021/acs.jpcc.0c10033

Smiljanić ML, Petek U, Bele M, Ruiz-Zepeda F, Šala M, Jovanovič P, Gaberšček M, Hodnik N. Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media. in The Journal of Physical Chemistry C. 2021;125(1):635-647.
doi:10.1021/acs.jpcc.0c10033 .

Smiljanić, Milutin Lj., Petek, Urša, Bele, Marjan, Ruiz-Zepeda, Francisco, Šala, Martin, Jovanovič, Primož, Gaberšček, Miran, Hodnik, Nejc, "Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media" in The Journal of Physical Chemistry C, 125, no. 1 (2021):635-647,
https://doi.org/10.1021/acs.jpcc.0c10033 . .

TY  - JOUR
AU  - Štrbac, Svetlana
AU  - Smiljanić, Milutin Lj.
AU  - Wakelin, Thomas
AU  - Potočnik, Jelena
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S001346861930516X
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8126
AB  - Hydrogen evolution reaction (HER) was studied in alkaline solution on Pt(poly) electrode modified by spontaneously deposited Ir nanoislands. Comprehensive insight into the characteristics of the bimetallic Ir/Pt(poly) catalysts was obtained by a combination of Atomic Force Microscopy (AFM), Field Emission Scanning Electron Microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS) and classical electrochemical techniques. HER investigations have shown that the presence of spontaneously deposited Ir enhances the activity of bare Pt(poly) in alkaline solution. This was attributed to the heterogeneity of the active surface sites and to the electronic interaction between two metals in close contact which together facilitated the adsorption of the H intermediate species. © 2019 Elsevier Ltd
T2  - Electrochimica Acta
T1  - Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution
VL  - 306
SP  - 18
EP  - 27
DO  - 10.1016/j.electacta.2019.03.100
ER  - 

@article{
author = "Štrbac, Svetlana and Smiljanić, Milutin Lj. and Wakelin, Thomas and Potočnik, Jelena and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "Hydrogen evolution reaction (HER) was studied in alkaline solution on Pt(poly) electrode modified by spontaneously deposited Ir nanoislands. Comprehensive insight into the characteristics of the bimetallic Ir/Pt(poly) catalysts was obtained by a combination of Atomic Force Microscopy (AFM), Field Emission Scanning Electron Microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS) and classical electrochemical techniques. HER investigations have shown that the presence of spontaneously deposited Ir enhances the activity of bare Pt(poly) in alkaline solution. This was attributed to the heterogeneity of the active surface sites and to the electronic interaction between two metals in close contact which together facilitated the adsorption of the H intermediate species. © 2019 Elsevier Ltd",
journal = "Electrochimica Acta",
title = "Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution",
volume = "306",
pages = "18-27",
doi = "10.1016/j.electacta.2019.03.100"
}

Štrbac, S., Smiljanić, M. Lj., Wakelin, T., Potočnik, J.,& Rakočević, Z. Lj.. (2019). Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution. in Electrochimica Acta, 306, 18-27.
https://doi.org/10.1016/j.electacta.2019.03.100

Štrbac S, Smiljanić ML, Wakelin T, Potočnik J, Rakočević ZL. Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution. in Electrochimica Acta. 2019;306:18-27.
doi:10.1016/j.electacta.2019.03.100 .

Štrbac, Svetlana, Smiljanić, Milutin Lj., Wakelin, Thomas, Potočnik, Jelena, Rakočević, Zlatko Lj., "Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution" in Electrochimica Acta, 306 (2019):18-27,
https://doi.org/10.1016/j.electacta.2019.03.100 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
AU  - Potočnik, Jelena
AU  - Štrbac, Svetlana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8504
AB  - Hydrogen evolution reaction (HER) was studied on polycrystalline Pd, Pd(poly), decorated by spontaneously deposited Ru nanoislands below full coverage. Surface features of as-prepared bimetallic Ru/Pd(poly) electrodes were explored by Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray Spectrometer. Electrochemical properties and hydrogen evolution activities of obtained electrodes were investigated in an alkaline electrolyte by Cyclic and Linear Sweep Voltammetry, respectively. It was found that the activities of bimetallic Ru/Pd(poly) electrodes for HER significantly exceeded the activity of bare Pd(poly) and approached the activity of Pt, which is the most active material for this reaction. This enhancement was explained by the favorable influence of the electronic interaction between Pd substrate and Ru nanoislands on the adsorption of the reactive H species. © 2019 The Authors.
T2  - International Journal of Electrochemical Science
T1  - Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium
VL  - 14
IS  - 7
SP  - 5938
EP  - 5949
DO  - 10.20964/2019.07.34
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj. and Potočnik, Jelena and Štrbac, Svetlana",
year = "2019",
abstract = "Hydrogen evolution reaction (HER) was studied on polycrystalline Pd, Pd(poly), decorated by spontaneously deposited Ru nanoislands below full coverage. Surface features of as-prepared bimetallic Ru/Pd(poly) electrodes were explored by Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray Spectrometer. Electrochemical properties and hydrogen evolution activities of obtained electrodes were investigated in an alkaline electrolyte by Cyclic and Linear Sweep Voltammetry, respectively. It was found that the activities of bimetallic Ru/Pd(poly) electrodes for HER significantly exceeded the activity of bare Pd(poly) and approached the activity of Pt, which is the most active material for this reaction. This enhancement was explained by the favorable influence of the electronic interaction between Pd substrate and Ru nanoislands on the adsorption of the reactive H species. © 2019 The Authors.",
journal = "International Journal of Electrochemical Science",
title = "Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium",
volume = "14",
number = "7",
pages = "5938-5949",
doi = "10.20964/2019.07.34"
}

Smiljanić, M. Lj., Rakočević, Z. Lj., Potočnik, J.,& Štrbac, S.. (2019). Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium. in International Journal of Electrochemical Science, 14(7), 5938-5949.
https://doi.org/10.20964/2019.07.34

Smiljanić ML, Rakočević ZL, Potočnik J, Štrbac S. Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium. in International Journal of Electrochemical Science. 2019;14(7):5938-5949.
doi:10.20964/2019.07.34 .

Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., Potočnik, Jelena, Štrbac, Svetlana, "Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium" in International Journal of Electrochemical Science, 14, no. 7 (2019):5938-5949,
https://doi.org/10.20964/2019.07.34 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Srejić, Irina
AU  - Potočnik, Jelena
AU  - Mitrić, Miodrag
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0360319918326909
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7893
AB  - Hydrogen evolution reaction (HER) was explored on tri-metallic Rh@Pd/Au(poly) and bimetallic Pd/Au(poly) and Rh/Au(poly) electrodes in alkaline solution. Electrodes were prepared by the spontaneous deposition of either Pd or Rh and by co-deposition of both Rh and Pd on polycrystalline gold electrode. Characterization of modified electrodes was performed by cyclic voltammetry in alkaline solution, while additional information about phase analysis, chemical composition and surface morphology of tri-metallic Rh@Pd/Au(poly) electrode were acquired using X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy and atomic force microscopy. Investigations of HER catalysis have shown that the activity of tri-metallic Rh@Pd/Au(poly) electrode exceeds the activities of both Pd/Au(poly) and Rh/Au(poly) electrodes, meaning that the synergism between co-deposited Pd and Rh islands is achieved. Moreover, Rh@Pd/Au(poly) electrode showed significant approach to the activities of bulk Pd and Rh electrodes for HER, especially when taking into account low activity of bare Au substrate. Synergistic effect of co-deposited Pd and Rh islands is a consequence of the strong electronic interaction between three metals in a close contact, which promotes the activity for HER by lowering the adsorption energy of Hads intermediate. © 2018 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - Synergistic electrocatalytic effect of Pd and Rh nanoislands co-deposited on Au(poly) on HER in alkaline solution
VL  - 43
IS  - 42
SP  - 19420
EP  - 19431
DO  - 10.1016/j.ijhydene.2018.08.117
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Srejić, Irina and Potočnik, Jelena and Mitrić, Miodrag and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2018",
abstract = "Hydrogen evolution reaction (HER) was explored on tri-metallic Rh@Pd/Au(poly) and bimetallic Pd/Au(poly) and Rh/Au(poly) electrodes in alkaline solution. Electrodes were prepared by the spontaneous deposition of either Pd or Rh and by co-deposition of both Rh and Pd on polycrystalline gold electrode. Characterization of modified electrodes was performed by cyclic voltammetry in alkaline solution, while additional information about phase analysis, chemical composition and surface morphology of tri-metallic Rh@Pd/Au(poly) electrode were acquired using X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy and atomic force microscopy. Investigations of HER catalysis have shown that the activity of tri-metallic Rh@Pd/Au(poly) electrode exceeds the activities of both Pd/Au(poly) and Rh/Au(poly) electrodes, meaning that the synergism between co-deposited Pd and Rh islands is achieved. Moreover, Rh@Pd/Au(poly) electrode showed significant approach to the activities of bulk Pd and Rh electrodes for HER, especially when taking into account low activity of bare Au substrate. Synergistic effect of co-deposited Pd and Rh islands is a consequence of the strong electronic interaction between three metals in a close contact, which promotes the activity for HER by lowering the adsorption energy of Hads intermediate. © 2018 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "Synergistic electrocatalytic effect of Pd and Rh nanoislands co-deposited on Au(poly) on HER in alkaline solution",
volume = "43",
number = "42",
pages = "19420-19431",
doi = "10.1016/j.ijhydene.2018.08.117"
}

Smiljanić, M. Lj., Srejić, I., Potočnik, J., Mitrić, M., Rakočević, Z. Lj.,& Štrbac, S.. (2018). Synergistic electrocatalytic effect of Pd and Rh nanoislands co-deposited on Au(poly) on HER in alkaline solution. in International Journal of Hydrogen Energy, 43(42), 19420-19431.
https://doi.org/10.1016/j.ijhydene.2018.08.117

Smiljanić ML, Srejić I, Potočnik J, Mitrić M, Rakočević ZL, Štrbac S. Synergistic electrocatalytic effect of Pd and Rh nanoislands co-deposited on Au(poly) on HER in alkaline solution. in International Journal of Hydrogen Energy. 2018;43(42):19420-19431.
doi:10.1016/j.ijhydene.2018.08.117 .

Smiljanić, Milutin Lj., Srejić, Irina, Potočnik, Jelena, Mitrić, Miodrag, Rakočević, Zlatko Lj., Štrbac, Svetlana, "Synergistic electrocatalytic effect of Pd and Rh nanoislands co-deposited on Au(poly) on HER in alkaline solution" in International Journal of Hydrogen Energy, 43, no. 42 (2018):19420-19431,
https://doi.org/10.1016/j.ijhydene.2018.08.117 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7658
AB  - Hydrogen evolution reaction (HER) was investigated in alkaline solution on tri-metallic Rh@Pd/Pt(poly) electrode, prepared by spontaneous deposition of Rh on top of Pd/Pt(poly) electrode with intermediate Pd coverage of 35%. Characterization of tri-metallic catalyst was performed by electrochemical methods of cyclic voltammetry and CO stripping voltammetry, while its activity for HER was tested by linear sweep voltammetry in 0.1 M NaOH. Rh@Pd/Pt(poly) catalyst has shown superior catalytic activity for HER with respect to initial Pt(poly) and both corresponding bimetallic Pd/Pt(poly) and Rh/Pt(poly) electrodes. This was explained by a strong synergistic electronic interaction between three metals in close contact induced at a number of different active sites across the surface of tri-metallic catalyst, which results with lowering of the binding energy for the adsorption of H intermediate species. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Electrocatalysis of hydrogen evolution reaction on tri-metallic Rh@Pd/Pt(poly) electrode
VL  - 43
IS  - 5
SP  - 2763
EP  - 2771
DO  - 10.1016/j.ijhydene.2017.12.112
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2018",
abstract = "Hydrogen evolution reaction (HER) was investigated in alkaline solution on tri-metallic Rh@Pd/Pt(poly) electrode, prepared by spontaneous deposition of Rh on top of Pd/Pt(poly) electrode with intermediate Pd coverage of 35%. Characterization of tri-metallic catalyst was performed by electrochemical methods of cyclic voltammetry and CO stripping voltammetry, while its activity for HER was tested by linear sweep voltammetry in 0.1 M NaOH. Rh@Pd/Pt(poly) catalyst has shown superior catalytic activity for HER with respect to initial Pt(poly) and both corresponding bimetallic Pd/Pt(poly) and Rh/Pt(poly) electrodes. This was explained by a strong synergistic electronic interaction between three metals in close contact induced at a number of different active sites across the surface of tri-metallic catalyst, which results with lowering of the binding energy for the adsorption of H intermediate species. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Electrocatalysis of hydrogen evolution reaction on tri-metallic Rh@Pd/Pt(poly) electrode",
volume = "43",
number = "5",
pages = "2763-2771",
doi = "10.1016/j.ijhydene.2017.12.112"
}

Smiljanić, M. Lj., Rakočević, Z. Lj.,& Štrbac, S.. (2018). Electrocatalysis of hydrogen evolution reaction on tri-metallic Rh@Pd/Pt(poly) electrode. in International Journal of Hydrogen Energy, 43(5), 2763-2771.
https://doi.org/10.1016/j.ijhydene.2017.12.112

Smiljanić ML, Rakočević ZL, Štrbac S. Electrocatalysis of hydrogen evolution reaction on tri-metallic Rh@Pd/Pt(poly) electrode. in International Journal of Hydrogen Energy. 2018;43(5):2763-2771.
doi:10.1016/j.ijhydene.2017.12.112 .

Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., Štrbac, Svetlana, "Electrocatalysis of hydrogen evolution reaction on tri-metallic Rh@Pd/Pt(poly) electrode" in International Journal of Hydrogen Energy, 43, no. 5 (2018):2763-2771,
https://doi.org/10.1016/j.ijhydene.2017.12.112 . .

TY  - JOUR
AU  - Srejić, Irina
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1374
AB  - Catalytic properties of polycrystalline gold, Au(poly), were examined for the oxygen reduction reaction in alkaline solution using the rotating disc electrode technique. On electrochemically prepared Au(poly), oxygen reduction proceeds partly through 4e-reaction pathway resembling the activity of bare Au(100) in alkaline solution. Electrochemical behavior of such Au(100)-like polycrystalline gold electrode was compared with bare Au(100) surface, as well as with stepped Au(210)=Au[2(100)x(110)] and Au(533)=Au[4(111)x(100)] surfaces. It is shown that polycrystalline gold electrode behaved in a similar manner as stepped Au[n(111)x(100)] surfaces, meaning that the enrichment in (111)x(100) steps, rather than in (100) orientation is responsible for a partial 4e-reaction pathway in alkaline solution.
T2  - International Journal of Electrochemical Science
T1  - Oxygen Reduction on Au(100)-like Polycrystalline Gold Electrode in Alkaline Solution
VL  - 11
IS  - 12
SP  - 10436
EP  - 10448
DO  - 10.20964/2016.12.51
ER  - 

@article{
author = "Srejić, Irina and Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2016",
abstract = "Catalytic properties of polycrystalline gold, Au(poly), were examined for the oxygen reduction reaction in alkaline solution using the rotating disc electrode technique. On electrochemically prepared Au(poly), oxygen reduction proceeds partly through 4e-reaction pathway resembling the activity of bare Au(100) in alkaline solution. Electrochemical behavior of such Au(100)-like polycrystalline gold electrode was compared with bare Au(100) surface, as well as with stepped Au(210)=Au[2(100)x(110)] and Au(533)=Au[4(111)x(100)] surfaces. It is shown that polycrystalline gold electrode behaved in a similar manner as stepped Au[n(111)x(100)] surfaces, meaning that the enrichment in (111)x(100) steps, rather than in (100) orientation is responsible for a partial 4e-reaction pathway in alkaline solution.",
journal = "International Journal of Electrochemical Science",
title = "Oxygen Reduction on Au(100)-like Polycrystalline Gold Electrode in Alkaline Solution",
volume = "11",
number = "12",
pages = "10436-10448",
doi = "10.20964/2016.12.51"
}

Srejić, I., Smiljanić, M. Lj., Rakočević, Z. Lj.,& Štrbac, S.. (2016). Oxygen Reduction on Au(100)-like Polycrystalline Gold Electrode in Alkaline Solution. in International Journal of Electrochemical Science, 11(12), 10436-10448.
https://doi.org/10.20964/2016.12.51

Srejić I, Smiljanić ML, Rakočević ZL, Štrbac S. Oxygen Reduction on Au(100)-like Polycrystalline Gold Electrode in Alkaline Solution. in International Journal of Electrochemical Science. 2016;11(12):10436-10448.
doi:10.20964/2016.12.51 .

Srejić, Irina, Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., Štrbac, Svetlana, "Oxygen Reduction on Au(100)-like Polycrystalline Gold Electrode in Alkaline Solution" in International Journal of Electrochemical Science, 11, no. 12 (2016):10436-10448,
https://doi.org/10.20964/2016.12.51 . .

TY  - JOUR
AU  - Štrbac, Svetlana
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1325
AB  - Rhodium nanoislands were spontaneously deposited on Au(111) up to a full coverage. Obtained Rh/Au(111) bimetallic surface was characterized ex situ by Atomic Force Microscopy imaging and by X-Ray Photoelectron Microscopy, while in situ characterization was performed by Cyclic Voltammetry in 0.1 M NaOH solution. Pronounced catalysis of hydrogen evolution reaction has been observed on Rh modified Au(111) surface compared to bare Au(111). This is ascribed to the suitable geometry of obtained Rh/Au(111) nanostructured electrode surface providing large number of active sites and to the electronic interaction between Au(111) substrate and Rh deposit. (C) 2016 The Electrochemical Society. All rights reserved.
T2  - Journal of the Electrochemical Society
T1  - Spontaneously Deposited Rh on Au(111) Observed by AFM and XPS: Electrocatalysis of Hydrogen Evolution
VL  - 163
IS  - 12
SP  - D3027
EP  - D3033
DO  - 10.1149/2.0041612jes
ER  - 

@article{
author = "Štrbac, Svetlana and Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj.",
year = "2016",
abstract = "Rhodium nanoislands were spontaneously deposited on Au(111) up to a full coverage. Obtained Rh/Au(111) bimetallic surface was characterized ex situ by Atomic Force Microscopy imaging and by X-Ray Photoelectron Microscopy, while in situ characterization was performed by Cyclic Voltammetry in 0.1 M NaOH solution. Pronounced catalysis of hydrogen evolution reaction has been observed on Rh modified Au(111) surface compared to bare Au(111). This is ascribed to the suitable geometry of obtained Rh/Au(111) nanostructured electrode surface providing large number of active sites and to the electronic interaction between Au(111) substrate and Rh deposit. (C) 2016 The Electrochemical Society. All rights reserved.",
journal = "Journal of the Electrochemical Society",
title = "Spontaneously Deposited Rh on Au(111) Observed by AFM and XPS: Electrocatalysis of Hydrogen Evolution",
volume = "163",
number = "12",
pages = "D3027-D3033",
doi = "10.1149/2.0041612jes"
}

Štrbac, S., Smiljanić, M. Lj.,& Rakočević, Z. Lj.. (2016). Spontaneously Deposited Rh on Au(111) Observed by AFM and XPS: Electrocatalysis of Hydrogen Evolution. in Journal of the Electrochemical Society, 163(12), D3027-D3033.
https://doi.org/10.1149/2.0041612jes

Štrbac S, Smiljanić ML, Rakočević ZL. Spontaneously Deposited Rh on Au(111) Observed by AFM and XPS: Electrocatalysis of Hydrogen Evolution. in Journal of the Electrochemical Society. 2016;163(12):D3027-D3033.
doi:10.1149/2.0041612jes .

Štrbac, Svetlana, Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., "Spontaneously Deposited Rh on Au(111) Observed by AFM and XPS: Electrocatalysis of Hydrogen Evolution" in Journal of the Electrochemical Society, 163, no. 12 (2016):D3027-D3033,
https://doi.org/10.1149/2.0041612jes . .

TY  - JOUR
AU  - Maksić, Aleksandar
AU  - Smiljanić, Milutin Lj.
AU  - Miljanić, Šćepan S.
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1169
AB  - Bimetallic electrodes prepared by Rh nanoislands spontaneously deposited on polycrystalline palladium, Pd(poly), at submonolayer coverage were explored for ethanol oxidation in alkaline media. Characterization of obtained Rh/Pd(poly) nanostructures was performed ex situ by AFM imaging and by X-ray photoelectron spectroscopy. In situ characterization of the obtained electrodes and subsequent ethanol oxidation measurements were performed by cyclic voltammetry in 0.1 M KOH. Palladium surface with 50% Rh coverage exhibited the highest catalytic activity for ethanol oxidation in alkaline media. The origin of the enhanced catalysis of Rh/Pd(poly) surfaces with respect to bare Pd was explained by the electronic effect. Possible reaction pathways for ethanol oxidation were discussed taking into account the activity of obtained bimetallic electrodes for the oxidation of CO and acetaldehyde, as the most probable reaction intermediates. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - Ethanol Oxidation on Rh/Pd(poly) in Alkaline Solution
VL  - 209
SP  - 323
EP  - 331
DO  - 10.1016/j.electacta.2016.05.096
ER  - 

@article{
author = "Maksić, Aleksandar and Smiljanić, Milutin Lj. and Miljanić, Šćepan S. and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2016",
abstract = "Bimetallic electrodes prepared by Rh nanoislands spontaneously deposited on polycrystalline palladium, Pd(poly), at submonolayer coverage were explored for ethanol oxidation in alkaline media. Characterization of obtained Rh/Pd(poly) nanostructures was performed ex situ by AFM imaging and by X-ray photoelectron spectroscopy. In situ characterization of the obtained electrodes and subsequent ethanol oxidation measurements were performed by cyclic voltammetry in 0.1 M KOH. Palladium surface with 50% Rh coverage exhibited the highest catalytic activity for ethanol oxidation in alkaline media. The origin of the enhanced catalysis of Rh/Pd(poly) surfaces with respect to bare Pd was explained by the electronic effect. Possible reaction pathways for ethanol oxidation were discussed taking into account the activity of obtained bimetallic electrodes for the oxidation of CO and acetaldehyde, as the most probable reaction intermediates. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "Ethanol Oxidation on Rh/Pd(poly) in Alkaline Solution",
volume = "209",
pages = "323-331",
doi = "10.1016/j.electacta.2016.05.096"
}

Maksić, A., Smiljanić, M. Lj., Miljanić, Š. S., Rakočević, Z. Lj.,& Štrbac, S.. (2016). Ethanol Oxidation on Rh/Pd(poly) in Alkaline Solution. in Electrochimica Acta, 209, 323-331.
https://doi.org/10.1016/j.electacta.2016.05.096

Maksić A, Smiljanić ML, Miljanić ŠS, Rakočević ZL, Štrbac S. Ethanol Oxidation on Rh/Pd(poly) in Alkaline Solution. in Electrochimica Acta. 2016;209:323-331.
doi:10.1016/j.electacta.2016.05.096 .

Maksić, Aleksandar, Smiljanić, Milutin Lj., Miljanić, Šćepan S., Rakočević, Zlatko Lj., Štrbac, Svetlana, "Ethanol Oxidation on Rh/Pd(poly) in Alkaline Solution" in Electrochimica Acta, 209 (2016):323-331,
https://doi.org/10.1016/j.electacta.2016.05.096 . .

TY  - JOUR
AU  - Maksić, Aleksandar
AU  - Rakočević, Zlatko Lj.
AU  - Smiljanić, Milutin Lj.
AU  - Nenadović, Miloš
AU  - Štrbac, Svetlana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/244
AB  - Bimetallic electrodes prepared by Pd nanoislands spontaneously deposited on polycrystalline platinum, Pt(poly), at submonolayer coverage were explored for methanol oxidation in alkaline media. Characterization of obtained Pd/Pt(poly) nanostructures was performed ex situ by AFM imaging, spectroscopic ellipsometry and by X-ray photoelectron spectroscopy. In situ characterization of the obtained electrodes and subsequent methanol oxidation measurements were performed by cyclic voltammetry in 0.1 M KOH. Platinum surface with 35% Pd coverage exhibited the highest catalytic activity for methanol oxidation in alkaline media, exceeding those of bare Pt and Pd. Both synergistic and electronic effects are responsible for such enhanced catalysis. The origin of the synergistic effect and possible reaction pathways for methanol oxidation were discussed taking into account the activity of obtained bimetallic electrodes for the oxidation of CO and formaldehyde, as the most probable reaction intermediates. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Journal of Power Sources
T1  - Methanol oxidation on Pd/Pt(poly) in alkaline solution
VL  - 273
SP  - 724
EP  - 734
DO  - 10.1016/j.jpowsour.2014.09.138
ER  - 

@article{
author = "Maksić, Aleksandar and Rakočević, Zlatko Lj. and Smiljanić, Milutin Lj. and Nenadović, Miloš and Štrbac, Svetlana",
year = "2015",
abstract = "Bimetallic electrodes prepared by Pd nanoislands spontaneously deposited on polycrystalline platinum, Pt(poly), at submonolayer coverage were explored for methanol oxidation in alkaline media. Characterization of obtained Pd/Pt(poly) nanostructures was performed ex situ by AFM imaging, spectroscopic ellipsometry and by X-ray photoelectron spectroscopy. In situ characterization of the obtained electrodes and subsequent methanol oxidation measurements were performed by cyclic voltammetry in 0.1 M KOH. Platinum surface with 35% Pd coverage exhibited the highest catalytic activity for methanol oxidation in alkaline media, exceeding those of bare Pt and Pd. Both synergistic and electronic effects are responsible for such enhanced catalysis. The origin of the synergistic effect and possible reaction pathways for methanol oxidation were discussed taking into account the activity of obtained bimetallic electrodes for the oxidation of CO and formaldehyde, as the most probable reaction intermediates. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Journal of Power Sources",
title = "Methanol oxidation on Pd/Pt(poly) in alkaline solution",
volume = "273",
pages = "724-734",
doi = "10.1016/j.jpowsour.2014.09.138"
}

Maksić, A., Rakočević, Z. Lj., Smiljanić, M. Lj., Nenadović, M.,& Štrbac, S.. (2015). Methanol oxidation on Pd/Pt(poly) in alkaline solution. in Journal of Power Sources, 273, 724-734.
https://doi.org/10.1016/j.jpowsour.2014.09.138

Maksić A, Rakočević ZL, Smiljanić ML, Nenadović M, Štrbac S. Methanol oxidation on Pd/Pt(poly) in alkaline solution. in Journal of Power Sources. 2015;273:724-734.
doi:10.1016/j.jpowsour.2014.09.138 .

Maksić, Aleksandar, Rakočević, Zlatko Lj., Smiljanić, Milutin Lj., Nenadović, Miloš, Štrbac, Svetlana, "Methanol oxidation on Pd/Pt(poly) in alkaline solution" in Journal of Power Sources, 273 (2015):724-734,
https://doi.org/10.1016/j.jpowsour.2014.09.138 . .

TY  - JOUR
AU  - Štrbac, Svetlana
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/770
AB  - Hydrogen evolution reaction (HER) was investigated on bimetallic Rh/Pd(poly) electrodes in alkaline solution. Bimetallic electrodes were obtained by a spontaneous deposition of rhodium on polycrystalline Pd. Characterization of obtained electrodes was performed ex situ by atomic force microscopy and by spectroscopic ellipsometry. The results have shown that the coverage of palladium substrate with the deposited Rh nanoislands was up to 50%, depending on the chosen deposition time. Electrochemical properties and catalytic activity of Rh/Pd(poly) nanostructures for HER were examined in 0.1 M NaOH solution by cyclic voltammetry and linear sweep voltammetry. Rh/Pd(poly) electrodes have shown an enhanced activity for HER with respect to bare Pd(poly), which was ascribed to the strong electronic interaction between palladium substrate and the deposited rhodium islands. The enhanced catalytic activity of 50% Rh/Pd(poly) for HER in alkaline solution is comparable to that of bare Pt(poly). (C) 2015 Elsevier B.V. All rights reserved.
T2  - Journal of Electroanalytical Chemistry
T1  - Electrocatalysis of hydrogen evolution on polycrystalline palladium by rhodium nanoislands in alkaline solution
VL  - 755
SP  - 115
EP  - 121
DO  - 10.1016/j.jelechem.2015.07.044
ER  - 

@article{
author = "Štrbac, Svetlana and Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj.",
year = "2015",
abstract = "Hydrogen evolution reaction (HER) was investigated on bimetallic Rh/Pd(poly) electrodes in alkaline solution. Bimetallic electrodes were obtained by a spontaneous deposition of rhodium on polycrystalline Pd. Characterization of obtained electrodes was performed ex situ by atomic force microscopy and by spectroscopic ellipsometry. The results have shown that the coverage of palladium substrate with the deposited Rh nanoislands was up to 50%, depending on the chosen deposition time. Electrochemical properties and catalytic activity of Rh/Pd(poly) nanostructures for HER were examined in 0.1 M NaOH solution by cyclic voltammetry and linear sweep voltammetry. Rh/Pd(poly) electrodes have shown an enhanced activity for HER with respect to bare Pd(poly), which was ascribed to the strong electronic interaction between palladium substrate and the deposited rhodium islands. The enhanced catalytic activity of 50% Rh/Pd(poly) for HER in alkaline solution is comparable to that of bare Pt(poly). (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Journal of Electroanalytical Chemistry",
title = "Electrocatalysis of hydrogen evolution on polycrystalline palladium by rhodium nanoislands in alkaline solution",
volume = "755",
pages = "115-121",
doi = "10.1016/j.jelechem.2015.07.044"
}

Štrbac, S., Smiljanić, M. Lj.,& Rakočević, Z. Lj.. (2015). Electrocatalysis of hydrogen evolution on polycrystalline palladium by rhodium nanoislands in alkaline solution. in Journal of Electroanalytical Chemistry, 755, 115-121.
https://doi.org/10.1016/j.jelechem.2015.07.044

Štrbac S, Smiljanić ML, Rakočević ZL. Electrocatalysis of hydrogen evolution on polycrystalline palladium by rhodium nanoislands in alkaline solution. in Journal of Electroanalytical Chemistry. 2015;755:115-121.
doi:10.1016/j.jelechem.2015.07.044 .

Štrbac, Svetlana, Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., "Electrocatalysis of hydrogen evolution on polycrystalline palladium by rhodium nanoislands in alkaline solution" in Journal of Electroanalytical Chemistry, 755 (2015):115-121,
https://doi.org/10.1016/j.jelechem.2015.07.044 . .

TY  - THES
AU  - Smiljanić, Milutin Lj.
PY  - 2015
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=3199
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:11559/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=47652367
UR  - http://nardus.mpn.gov.rs/123456789/5867
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7286
AB  - Elektrokataliza reakcije izdvajanja vodonika ispitana je u kiseloj i alkalnojsredini na bimetalnim sistemima Pd/Au(111), Rh/Au(111), Pd/Pt(poly), Rh/Pt(poly) iRh/Pd(poly). Kao tehnika pripreme bimetalnih elektroda odabrana je spontanadepozicija, čime je omogućeno da se pri različitim vremenima dobijaju strukture sarazličitim pokrivenostima. Sam proces spontane depozicije je praćen promenompotencijala otvorenog kola, čime je omogućen adekvatan izbor vremena depozicije naosnovu brzine deponovanja i dostizanja saturacione pokrivenosti supstrata.Strukturna (površinska) karakterizacija modifikovanih i osnovnih elektrodaizvedena je ex situ tehnikom mikroskopije atomskih sila. Istovremenim snimanjemtopografskih i faznih slika, omogućen je uvid u različite karakteristike površinebimetalnih elektroda, kao što su dimenzije deponovanih ostrva, preferencijalnadepozicija na određenim površinskim mestima, eventualno prisustvo nečistoća ipokrivenost supstrata depozitom. U svim slučajevima primećen je ostrvski rast depozita,kao i pokrivenosti ispod jednog monosloja.Klasične elektrohemijske tehnike ciklične i linearne voltametrije su poslužile zaelektrohemijsku karakterizaciju, ispitivanje katalitičkih svojstava bimetalnih sistema ipredlaganje mogućih reakcionih mehanizama za izdvajanje vodonika. Dobijeni rezultatisu pokazali da svi bimetalni sistemi pokazuju bolju aktivnost od čistog suptrata, u baremjednom elektrolitu. Sistem Pd/Au(111) je pokazao značajno poboljšanje aktivnosti uodnosu na monokristal zlata, dok je sistem Rh/Au(111) pokazao još veću aktivnost zaizdvajanje vodonika, koja je veoma bliska aktivnosti platine. Sistemi Pd/Pt(poly) iRh/Pt(poly) su aktivniji od Pt(poly) u alkalnom elektrolitu, što je veoma značajnoimajući u vidu da je Pt najaktivniji metal za reakciju izdvajanja vodonika. SistemRh/Pd(poly) je takođe pokazao poboljšana katalitička svojstva od supstrata, posebno ualkalnoj sredini. Unapređena katalitička aktivnost ispitanih nanostruktura je u svimslučajevima objašnjena geometrijskim i elektronskim efektom supstrata na depozit, usled kojeg bimetalne strukture poseduju drugačija elektrokatalitička svojstva odkonstitutivnih metala.
AB  - Electrocatalysis of the hydrogen evolution reaction was examined on bimetallicelectrodes Pd/Au(111), Rh/Au(111), Pd/Pt(poly), Rh/Pt(poly) and Rh/Pd(poly) in bothacid and alkaline electrolytes. Preparation of the bimetallic electrodes with differentcoverage was carried out by the spontaneous deposition during different times. Thespontaneous deposition process was monitored by chronopotentiometric measurementof open circuit potential, which enabled adequate choice of the deposition times basedon the deposition rate and the achievement of the saturation coverage.Surface characterization of the modified bimetallic electrodes, as well as basesubstrate electrodes, were performed ex situ by atomic force microscopy.Simultaneously recorded topographic and phase images provided insight into differentcharacteristics of the bimetallic surfaces, such as the dimensions of the depositedislands, occurrence of the preferential deposition along specific surface sites and thesubstrate coverage with deposited islands. In all cases, atomic force microscopyrevealed that the spontaneous deposition follows the island growth with submonolayercoverage.Classical electrochemical techniques were used for electrochemicalcharacterization and exploration of the catalytic properties for hydrogen evolution, andproposition of the possible reaction mechanisms. Results have shown that all bimetallicelectrodes exhibited higher activities than bare substrate, in at least one electrolyte. Inthe case of Au(111) substrate, Pd/Au(111) electrodes have shown high activity forhydrogen evolution, while even higher activity, which is close to the activity ofplatinum, was obtained for Rh/Au(111) electrodes. Bimetallic electrodes Pd/Pt(poly)and Rh/Pt(poly) are more active than bare Pt(poly) in alkaline media, which is veryimportant due to the fact that Pt is the most active metal for hydrogen evolution.Rh/Pd(poly) electrodes have shown enhanced catalytic properties for this reaction withrespect to Pd(poly), which are more pronounced in alkaline media. The improved catalytic activity of the hereby explored bimetallic electrodes wasinterpreted by the means of geometric and electronic effects of the substrates, which areresponsible for different electrocatalytic properties with respect to both constitutivemetals.
PB  - Универзитет у Београду, Технолошко-металуршки факултет
T2  - Универзитет у Београду
T1  - Elektrohemijska kataliza reakcije izdvajanja vodonika na modifikovanim površinama zlata, platine i paladijuma
T1  - Electrochemical catalysis of hydrogen evolution reaction on modified surfaces of gold, platinium and palladium
UR  - https://hdl.handle.net/21.15107/rcub_nardus_5867
ER  - 

@phdthesis{
author = "Smiljanić, Milutin Lj.",
year = "2015",
abstract = "Elektrokataliza reakcije izdvajanja vodonika ispitana je u kiseloj i alkalnojsredini na bimetalnim sistemima Pd/Au(111), Rh/Au(111), Pd/Pt(poly), Rh/Pt(poly) iRh/Pd(poly). Kao tehnika pripreme bimetalnih elektroda odabrana je spontanadepozicija, čime je omogućeno da se pri različitim vremenima dobijaju strukture sarazličitim pokrivenostima. Sam proces spontane depozicije je praćen promenompotencijala otvorenog kola, čime je omogućen adekvatan izbor vremena depozicije naosnovu brzine deponovanja i dostizanja saturacione pokrivenosti supstrata.Strukturna (površinska) karakterizacija modifikovanih i osnovnih elektrodaizvedena je ex situ tehnikom mikroskopije atomskih sila. Istovremenim snimanjemtopografskih i faznih slika, omogućen je uvid u različite karakteristike površinebimetalnih elektroda, kao što su dimenzije deponovanih ostrva, preferencijalnadepozicija na određenim površinskim mestima, eventualno prisustvo nečistoća ipokrivenost supstrata depozitom. U svim slučajevima primećen je ostrvski rast depozita,kao i pokrivenosti ispod jednog monosloja.Klasične elektrohemijske tehnike ciklične i linearne voltametrije su poslužile zaelektrohemijsku karakterizaciju, ispitivanje katalitičkih svojstava bimetalnih sistema ipredlaganje mogućih reakcionih mehanizama za izdvajanje vodonika. Dobijeni rezultatisu pokazali da svi bimetalni sistemi pokazuju bolju aktivnost od čistog suptrata, u baremjednom elektrolitu. Sistem Pd/Au(111) je pokazao značajno poboljšanje aktivnosti uodnosu na monokristal zlata, dok je sistem Rh/Au(111) pokazao još veću aktivnost zaizdvajanje vodonika, koja je veoma bliska aktivnosti platine. Sistemi Pd/Pt(poly) iRh/Pt(poly) su aktivniji od Pt(poly) u alkalnom elektrolitu, što je veoma značajnoimajući u vidu da je Pt najaktivniji metal za reakciju izdvajanja vodonika. SistemRh/Pd(poly) je takođe pokazao poboljšana katalitička svojstva od supstrata, posebno ualkalnoj sredini. Unapređena katalitička aktivnost ispitanih nanostruktura je u svimslučajevima objašnjena geometrijskim i elektronskim efektom supstrata na depozit, usled kojeg bimetalne strukture poseduju drugačija elektrokatalitička svojstva odkonstitutivnih metala., Electrocatalysis of the hydrogen evolution reaction was examined on bimetallicelectrodes Pd/Au(111), Rh/Au(111), Pd/Pt(poly), Rh/Pt(poly) and Rh/Pd(poly) in bothacid and alkaline electrolytes. Preparation of the bimetallic electrodes with differentcoverage was carried out by the spontaneous deposition during different times. Thespontaneous deposition process was monitored by chronopotentiometric measurementof open circuit potential, which enabled adequate choice of the deposition times basedon the deposition rate and the achievement of the saturation coverage.Surface characterization of the modified bimetallic electrodes, as well as basesubstrate electrodes, were performed ex situ by atomic force microscopy.Simultaneously recorded topographic and phase images provided insight into differentcharacteristics of the bimetallic surfaces, such as the dimensions of the depositedislands, occurrence of the preferential deposition along specific surface sites and thesubstrate coverage with deposited islands. In all cases, atomic force microscopyrevealed that the spontaneous deposition follows the island growth with submonolayercoverage.Classical electrochemical techniques were used for electrochemicalcharacterization and exploration of the catalytic properties for hydrogen evolution, andproposition of the possible reaction mechanisms. Results have shown that all bimetallicelectrodes exhibited higher activities than bare substrate, in at least one electrolyte. Inthe case of Au(111) substrate, Pd/Au(111) electrodes have shown high activity forhydrogen evolution, while even higher activity, which is close to the activity ofplatinum, was obtained for Rh/Au(111) electrodes. Bimetallic electrodes Pd/Pt(poly)and Rh/Pt(poly) are more active than bare Pt(poly) in alkaline media, which is veryimportant due to the fact that Pt is the most active metal for hydrogen evolution.Rh/Pd(poly) electrodes have shown enhanced catalytic properties for this reaction withrespect to Pd(poly), which are more pronounced in alkaline media. The improved catalytic activity of the hereby explored bimetallic electrodes wasinterpreted by the means of geometric and electronic effects of the substrates, which areresponsible for different electrocatalytic properties with respect to both constitutivemetals.",
publisher = "Универзитет у Београду, Технолошко-металуршки факултет",
journal = "Универзитет у Београду",
title = "Elektrohemijska kataliza reakcije izdvajanja vodonika na modifikovanim površinama zlata, platine i paladijuma, Electrochemical catalysis of hydrogen evolution reaction on modified surfaces of gold, platinium and palladium",
url = "https://hdl.handle.net/21.15107/rcub_nardus_5867"
}

Smiljanić, M. Lj.. (2015). Elektrohemijska kataliza reakcije izdvajanja vodonika na modifikovanim površinama zlata, platine i paladijuma. in Универзитет у Београду
Универзитет у Београду, Технолошко-металуршки факултет..
https://hdl.handle.net/21.15107/rcub_nardus_5867

Smiljanić ML. Elektrohemijska kataliza reakcije izdvajanja vodonika na modifikovanim površinama zlata, platine i paladijuma. in Универзитет у Београду. 2015;.
https://hdl.handle.net/21.15107/rcub_nardus_5867 .

Smiljanić, Milutin Lj., "Elektrohemijska kataliza reakcije izdvajanja vodonika na modifikovanim površinama zlata, platine i paladijuma" in Универзитет у Београду (2015),
https://hdl.handle.net/21.15107/rcub_nardus_5867 .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
AU  - Maksić, Aleksandar
AU  - Štrbac, Svetlana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5925
AB  - Pd/Pt(poly) and Rh/Pt(poly) bimetallic electrodes prepared by spontaneous deposition of Pd and Rh nanoislands on Pt(poly) at submonolayer coverage were explored as catalysts for hydrogen evolution reaction (HER) in alkaline media. Characterization of bimetallic surfaces was performed ex situ by height and phase AFM imaging and in situ by cyclic voltammetry. HER was investigated by linear sweep voltammetry in 0.1 M NaOH. Both Pd/Pt(poly) and Rh/Pt(poly) surfaces exhibited an enhanced catalysis for HER with respect to bare Pt(poly), which is explained by a strong synergistic electronic effect of platinum substrate on the deposited Pd or Rh nanoislands. This electronic effect leads to the lowering of a binding energy of adsorbed hydrogen intermediate and consequently to the lowering of the overpotential for HER. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - Hydrogen Evolution Reaction on Platinum Catalyzed by Palladium and Rhodium Nanoislands
VL  - 117
SP  - 336
EP  - 343
DO  - 10.1016/j.electacta.2013.11.142
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj. and Maksić, Aleksandar and Štrbac, Svetlana",
year = "2014",
abstract = "Pd/Pt(poly) and Rh/Pt(poly) bimetallic electrodes prepared by spontaneous deposition of Pd and Rh nanoislands on Pt(poly) at submonolayer coverage were explored as catalysts for hydrogen evolution reaction (HER) in alkaline media. Characterization of bimetallic surfaces was performed ex situ by height and phase AFM imaging and in situ by cyclic voltammetry. HER was investigated by linear sweep voltammetry in 0.1 M NaOH. Both Pd/Pt(poly) and Rh/Pt(poly) surfaces exhibited an enhanced catalysis for HER with respect to bare Pt(poly), which is explained by a strong synergistic electronic effect of platinum substrate on the deposited Pd or Rh nanoislands. This electronic effect leads to the lowering of a binding energy of adsorbed hydrogen intermediate and consequently to the lowering of the overpotential for HER. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "Hydrogen Evolution Reaction on Platinum Catalyzed by Palladium and Rhodium Nanoislands",
volume = "117",
pages = "336-343",
doi = "10.1016/j.electacta.2013.11.142"
}

Smiljanić, M. Lj., Rakočević, Z. Lj., Maksić, A.,& Štrbac, S.. (2014). Hydrogen Evolution Reaction on Platinum Catalyzed by Palladium and Rhodium Nanoislands. in Electrochimica Acta, 117, 336-343.
https://doi.org/10.1016/j.electacta.2013.11.142

Smiljanić ML, Rakočević ZL, Maksić A, Štrbac S. Hydrogen Evolution Reaction on Platinum Catalyzed by Palladium and Rhodium Nanoislands. in Electrochimica Acta. 2014;117:336-343.
doi:10.1016/j.electacta.2013.11.142 .

Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., Maksić, Aleksandar, Štrbac, Svetlana, "Hydrogen Evolution Reaction on Platinum Catalyzed by Palladium and Rhodium Nanoislands" in Electrochimica Acta, 117 (2014):336-343,
https://doi.org/10.1016/j.electacta.2013.11.142 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Srejić, Irina
AU  - Grgur, Branimir
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5316
AB  - Hydrogen evolution reaction (HER) was studied on Pd/Au(1 1 1) bimetallic surfaces in alkaline solution. Au(1 1 1) was modified by palladium nanoislands spontaneously deposited using PdSO4 center dot 2H(2)O and PdCl2 salts. As revealed from both surface topography Atomic Force Microscopy (AFM) and phase AFM images, for the same deposition conditions, the obtained Pd/Au(1 1 1) nanostructures differ depending on the counter anion in the depositing palladium salt. These differences are reflected on their catalytic activity toward HER, which occurs between the potentials for pure consisting metals. HER proceeded with the same mechanism, but it is shifted to more positive potentials for Pd/Au(1 1 1) nanostructures obtained using PdCl2 salt with respect to ones obtained using PdSO4 salt. Better catalytic activity of Pd/Au(1 1 1) nanostructures obtained using PdCl2 salt can be explained by their surface structure consisting of smaller and thinner Pd nanoislands, preferentially deposited at steps, which provides more Pd and Pd/Au sites suitable for hydrogen evolution reaction. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - Catalysis of hydrogen evolution on different Pd/Au(111) nanostructures in alkaline solution
VL  - 88
SP  - 589
EP  - 596
DO  - 10.1016/j.electacta.2012.10.128
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Srejić, Irina and Grgur, Branimir and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2013",
abstract = "Hydrogen evolution reaction (HER) was studied on Pd/Au(1 1 1) bimetallic surfaces in alkaline solution. Au(1 1 1) was modified by palladium nanoislands spontaneously deposited using PdSO4 center dot 2H(2)O and PdCl2 salts. As revealed from both surface topography Atomic Force Microscopy (AFM) and phase AFM images, for the same deposition conditions, the obtained Pd/Au(1 1 1) nanostructures differ depending on the counter anion in the depositing palladium salt. These differences are reflected on their catalytic activity toward HER, which occurs between the potentials for pure consisting metals. HER proceeded with the same mechanism, but it is shifted to more positive potentials for Pd/Au(1 1 1) nanostructures obtained using PdCl2 salt with respect to ones obtained using PdSO4 salt. Better catalytic activity of Pd/Au(1 1 1) nanostructures obtained using PdCl2 salt can be explained by their surface structure consisting of smaller and thinner Pd nanoislands, preferentially deposited at steps, which provides more Pd and Pd/Au sites suitable for hydrogen evolution reaction. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "Catalysis of hydrogen evolution on different Pd/Au(111) nanostructures in alkaline solution",
volume = "88",
pages = "589-596",
doi = "10.1016/j.electacta.2012.10.128"
}

Smiljanić, M. Lj., Srejić, I., Grgur, B., Rakočević, Z. Lj.,& Štrbac, S.. (2013). Catalysis of hydrogen evolution on different Pd/Au(111) nanostructures in alkaline solution. in Electrochimica Acta, 88, 589-596.
https://doi.org/10.1016/j.electacta.2012.10.128

Smiljanić ML, Srejić I, Grgur B, Rakočević ZL, Štrbac S. Catalysis of hydrogen evolution on different Pd/Au(111) nanostructures in alkaline solution. in Electrochimica Acta. 2013;88:589-596.
doi:10.1016/j.electacta.2012.10.128 .

Smiljanić, Milutin Lj., Srejić, Irina, Grgur, Branimir, Rakočević, Zlatko Lj., Štrbac, Svetlana, "Catalysis of hydrogen evolution on different Pd/Au(111) nanostructures in alkaline solution" in Electrochimica Acta, 88 (2013):589-596,
https://doi.org/10.1016/j.electacta.2012.10.128 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Srejić, Irina
AU  - Grgur, B.
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5344
AB  - Pronounced catalysis of hydrogen evolution reaction (HER) by rhodium nanoislands spontaneously deposited on Au(111) has been observed. Different Rh/Au(111) nanostructures were characterized ex situ by both height and phase imaging AFM. The most pronounced catalytic activity for HER in 0.5 M H2SO4 was obtained for 50% Rh coverage. This is ascribed to the suitable size of Rh nanoislands and to the electronic modification of Rh deposit by Au(111) substrate. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Electrochemistry Communications
T1  - Hydrogen evolution on Au(111) catalyzed by rhodium nanoislands
VL  - 28
SP  - 37
EP  - 39
DO  - 10.1016/j.elecom.2012.12.009
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Srejić, Irina and Grgur, B. and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2013",
abstract = "Pronounced catalysis of hydrogen evolution reaction (HER) by rhodium nanoislands spontaneously deposited on Au(111) has been observed. Different Rh/Au(111) nanostructures were characterized ex situ by both height and phase imaging AFM. The most pronounced catalytic activity for HER in 0.5 M H2SO4 was obtained for 50% Rh coverage. This is ascribed to the suitable size of Rh nanoislands and to the electronic modification of Rh deposit by Au(111) substrate. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Electrochemistry Communications",
title = "Hydrogen evolution on Au(111) catalyzed by rhodium nanoislands",
volume = "28",
pages = "37-39",
doi = "10.1016/j.elecom.2012.12.009"
}

Smiljanić, M. Lj., Srejić, I., Grgur, B., Rakočević, Z. Lj.,& Štrbac, S.. (2013). Hydrogen evolution on Au(111) catalyzed by rhodium nanoislands. in Electrochemistry Communications, 28, 37-39.
https://doi.org/10.1016/j.elecom.2012.12.009

Smiljanić ML, Srejić I, Grgur B, Rakočević ZL, Štrbac S. Hydrogen evolution on Au(111) catalyzed by rhodium nanoislands. in Electrochemistry Communications. 2013;28:37-39.
doi:10.1016/j.elecom.2012.12.009 .

Smiljanić, Milutin Lj., Srejić, Irina, Grgur, B., Rakočević, Zlatko Lj., Štrbac, Svetlana, "Hydrogen evolution on Au(111) catalyzed by rhodium nanoislands" in Electrochemistry Communications, 28 (2013):37-39,
https://doi.org/10.1016/j.elecom.2012.12.009 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5478
AB  - Catalytic properties of Pd/Au(111) nanostructures obtained by spontaneous palladium deposition using PdSO4 and PdCl2 salts were examined for the oxidation of ethanol in alkaline media. Atomic force microscopy has shown that counter anions in Pd salts are responsible for the differences in surface topography. In both cases the oxidation of ethanol is characterized by the rise of a new peak at approximately the same potential for the same coverage, indicating similar electronic modification of Pd islands by the Au(111) substrate. Pd/Au(111) nanostructures obtained using PdCl2 salt have shown higher ethanol oxidation current densities, which can be ascribed to the surface structure consisting of thinner and smoother Pd deposit providing more convenient sites for the adsorption of ethanol and its subsequent oxidation.
T2  - International Journal of Electrochemical Science
T1  - Ethanol Oxidation on Pd/Au(111) Bimetallic Surfaces in Alkaline Solution
VL  - 8
IS  - 4
SP  - 4941
EP  - 4954
UR  - https://hdl.handle.net/21.15107/rcub_vinar_5478
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2013",
abstract = "Catalytic properties of Pd/Au(111) nanostructures obtained by spontaneous palladium deposition using PdSO4 and PdCl2 salts were examined for the oxidation of ethanol in alkaline media. Atomic force microscopy has shown that counter anions in Pd salts are responsible for the differences in surface topography. In both cases the oxidation of ethanol is characterized by the rise of a new peak at approximately the same potential for the same coverage, indicating similar electronic modification of Pd islands by the Au(111) substrate. Pd/Au(111) nanostructures obtained using PdCl2 salt have shown higher ethanol oxidation current densities, which can be ascribed to the surface structure consisting of thinner and smoother Pd deposit providing more convenient sites for the adsorption of ethanol and its subsequent oxidation.",
journal = "International Journal of Electrochemical Science",
title = "Ethanol Oxidation on Pd/Au(111) Bimetallic Surfaces in Alkaline Solution",
volume = "8",
number = "4",
pages = "4941-4954",
url = "https://hdl.handle.net/21.15107/rcub_vinar_5478"
}

Smiljanić, M. Lj., Rakočević, Z. Lj.,& Štrbac, S.. (2013). Ethanol Oxidation on Pd/Au(111) Bimetallic Surfaces in Alkaline Solution. in International Journal of Electrochemical Science, 8(4), 4941-4954.
https://hdl.handle.net/21.15107/rcub_vinar_5478

Smiljanić ML, Rakočević ZL, Štrbac S. Ethanol Oxidation on Pd/Au(111) Bimetallic Surfaces in Alkaline Solution. in International Journal of Electrochemical Science. 2013;8(4):4941-4954.
https://hdl.handle.net/21.15107/rcub_vinar_5478 .

Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., Štrbac, Svetlana, "Ethanol Oxidation on Pd/Au(111) Bimetallic Surfaces in Alkaline Solution" in International Journal of Electrochemical Science, 8, no. 4 (2013):4941-4954,
https://hdl.handle.net/21.15107/rcub_vinar_5478 .

TY  - JOUR
AU  - Štrbac, Svetlana
AU  - Srejić, Irina
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5696
AB  - The effect of spontaneously deposited rhodium nanoislands on the electrocatalytic activity of polycrystalline gold, Au(poly), for oxygen reduction reaction (ORR) was studied using rotating disc electrode technique in 0.1 M HClO4 solution. Surface topography atomic force microscopy (AFM) images of obtained Rh/Au(poly) surfaces revealed that both the size and coverage of rhodium nanoislands increase with the deposition time, for a given depositing conditions. The exact values of rhodium coverage ranging from 50% to the full coverage, and the qualitative changes in the surface chemical composition with respect to bare gold were estimated from phase AFM images. Deposited Rh was also identified by the changes in cyclic voltammetry (CV) profiles from which potential limits for ORR were determined. Obtained Rh/Au(poly) surfaces have shown a significant shift of the initial potential for ORR to the more positive potentials with respect to pure gold already for 50% Rh coverage, indicating that a pronounced electronic effect is responsible for the lowering of the activation energy for oxygen adsorption. The initial potential increases only slightly with the further increase of Rh coverage. Reaction pathway changes from 2e- reduction at lower overpotentials to a partial 4e- reduction at higher overpotentials. The later is attributed to the increased activity of obtained Rh/Au(poly) surfaces towards hydrogen peroxide reduction (HPRR), which appear as an intermediate during ORR. The fraction of 4e- reduction slightly increases with the increase of Rh coverage. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Journal of Electroanalytical Chemistry
T1  - The effect of rhodium nanoislands on the electrocatalytic activity of gold for oxygen reduction in perchloric acid solution
VL  - 704
SP  - 24
EP  - 31
DO  - 10.1016/j.jelechem.2013.06.003
ER  - 

@article{
author = "Štrbac, Svetlana and Srejić, Irina and Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj.",
year = "2013",
abstract = "The effect of spontaneously deposited rhodium nanoislands on the electrocatalytic activity of polycrystalline gold, Au(poly), for oxygen reduction reaction (ORR) was studied using rotating disc electrode technique in 0.1 M HClO4 solution. Surface topography atomic force microscopy (AFM) images of obtained Rh/Au(poly) surfaces revealed that both the size and coverage of rhodium nanoislands increase with the deposition time, for a given depositing conditions. The exact values of rhodium coverage ranging from 50% to the full coverage, and the qualitative changes in the surface chemical composition with respect to bare gold were estimated from phase AFM images. Deposited Rh was also identified by the changes in cyclic voltammetry (CV) profiles from which potential limits for ORR were determined. Obtained Rh/Au(poly) surfaces have shown a significant shift of the initial potential for ORR to the more positive potentials with respect to pure gold already for 50% Rh coverage, indicating that a pronounced electronic effect is responsible for the lowering of the activation energy for oxygen adsorption. The initial potential increases only slightly with the further increase of Rh coverage. Reaction pathway changes from 2e- reduction at lower overpotentials to a partial 4e- reduction at higher overpotentials. The later is attributed to the increased activity of obtained Rh/Au(poly) surfaces towards hydrogen peroxide reduction (HPRR), which appear as an intermediate during ORR. The fraction of 4e- reduction slightly increases with the increase of Rh coverage. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Journal of Electroanalytical Chemistry",
title = "The effect of rhodium nanoislands on the electrocatalytic activity of gold for oxygen reduction in perchloric acid solution",
volume = "704",
pages = "24-31",
doi = "10.1016/j.jelechem.2013.06.003"
}

Štrbac, S., Srejić, I., Smiljanić, M. Lj.,& Rakočević, Z. Lj.. (2013). The effect of rhodium nanoislands on the electrocatalytic activity of gold for oxygen reduction in perchloric acid solution. in Journal of Electroanalytical Chemistry, 704, 24-31.
https://doi.org/10.1016/j.jelechem.2013.06.003

Štrbac S, Srejić I, Smiljanić ML, Rakočević ZL. The effect of rhodium nanoislands on the electrocatalytic activity of gold for oxygen reduction in perchloric acid solution. in Journal of Electroanalytical Chemistry. 2013;704:24-31.
doi:10.1016/j.jelechem.2013.06.003 .

Štrbac, Svetlana, Srejić, Irina, Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., "The effect of rhodium nanoislands on the electrocatalytic activity of gold for oxygen reduction in perchloric acid solution" in Journal of Electroanalytical Chemistry, 704 (2013):24-31,
https://doi.org/10.1016/j.jelechem.2013.06.003 . .

TY  - JOUR
AU  - Srejić, Irina
AU  - Smiljanić, Milutin Lj.
AU  - Grgur, Branimir
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4750
AB  - Oxygen reduction reaction (ORR) was studied on polycrystalline gold, Au(poly), modified by nanosized palladium islands in 0.1 M HClO4 solution using rotating disc electrode technique. Paladium was spontaneously deposited from 1 mM PdSO4 center dot 2H(2)O + 0.5 M H2SO4 solution for various deposition times at a submonolayer coverage. Topography of obtained Pd/Au(poly) surfaces was observed by tapping mode atomic force microscopy (AFM), while chemical surface composition changes were detected by simultaneously performed phase AFM. Deposited Pd islands were nonuniform in size and randomly distributed over the gold substrate. Size and number of Pd islands increase with the increase of the deposition time, and consequently surface coverage increases too. Deposited Pd was also identified by the changes in cyclic voltammetry (CV) profiles from which an active surface area was estimated. Obtained Pd/Au(poly) surfaces have shown a significant catalytic activity towards oxygen reduction reaction which increases with the increase of Pd islands coverage. The initial potential of ORR was shifted positively, while reaction pathway changes from 2e-reduction on pure gold to 4e-reduction on Pd modified gold. Additionally, obtained Pd/Au(poly) surfaces have shown a significant activity towards hydrogen peroxide reduction (HPRR), which appear as an intermediate during ORR. This supports the assumption that ORR on Pd/Au(poly) occurs partly through 4e-series reduction pathway, the fraction of which increases with the increase of Pd coverage. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - Catalysis of oxygen reduction on Au modified by Pd nanoislands in perchloric acid solution
VL  - 64
SP  - 140
EP  - 146
DO  - 10.1016/j.electacta.2011.12.130
ER  - 

@article{
author = "Srejić, Irina and Smiljanić, Milutin Lj. and Grgur, Branimir and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2012",
abstract = "Oxygen reduction reaction (ORR) was studied on polycrystalline gold, Au(poly), modified by nanosized palladium islands in 0.1 M HClO4 solution using rotating disc electrode technique. Paladium was spontaneously deposited from 1 mM PdSO4 center dot 2H(2)O + 0.5 M H2SO4 solution for various deposition times at a submonolayer coverage. Topography of obtained Pd/Au(poly) surfaces was observed by tapping mode atomic force microscopy (AFM), while chemical surface composition changes were detected by simultaneously performed phase AFM. Deposited Pd islands were nonuniform in size and randomly distributed over the gold substrate. Size and number of Pd islands increase with the increase of the deposition time, and consequently surface coverage increases too. Deposited Pd was also identified by the changes in cyclic voltammetry (CV) profiles from which an active surface area was estimated. Obtained Pd/Au(poly) surfaces have shown a significant catalytic activity towards oxygen reduction reaction which increases with the increase of Pd islands coverage. The initial potential of ORR was shifted positively, while reaction pathway changes from 2e-reduction on pure gold to 4e-reduction on Pd modified gold. Additionally, obtained Pd/Au(poly) surfaces have shown a significant activity towards hydrogen peroxide reduction (HPRR), which appear as an intermediate during ORR. This supports the assumption that ORR on Pd/Au(poly) occurs partly through 4e-series reduction pathway, the fraction of which increases with the increase of Pd coverage. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "Catalysis of oxygen reduction on Au modified by Pd nanoislands in perchloric acid solution",
volume = "64",
pages = "140-146",
doi = "10.1016/j.electacta.2011.12.130"
}

Srejić, I., Smiljanić, M. Lj., Grgur, B., Rakočević, Z. Lj.,& Štrbac, S.. (2012). Catalysis of oxygen reduction on Au modified by Pd nanoislands in perchloric acid solution. in Electrochimica Acta, 64, 140-146.
https://doi.org/10.1016/j.electacta.2011.12.130

Srejić I, Smiljanić ML, Grgur B, Rakočević ZL, Štrbac S. Catalysis of oxygen reduction on Au modified by Pd nanoislands in perchloric acid solution. in Electrochimica Acta. 2012;64:140-146.
doi:10.1016/j.electacta.2011.12.130 .

Srejić, Irina, Smiljanić, Milutin Lj., Grgur, Branimir, Rakočević, Zlatko Lj., Štrbac, Svetlana, "Catalysis of oxygen reduction on Au modified by Pd nanoislands in perchloric acid solution" in Electrochimica Acta, 64 (2012):140-146,
https://doi.org/10.1016/j.electacta.2011.12.130 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Srejić, Irina
AU  - Marinovic, Vedrana M.
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5134
AB  - The oxygen reduction reaction (ORR) was studied on a polycrystalline Pt electrode in 0.1 M NaCl electrolyte containing various amounts of acetonitrile (AcN). The state of the electrode surface was characterized by cyclic voltammetry in oxygen free electrolytes, while ORR studies were performed on a polycrystalline Pt rotating disc electrode by linear sweep voltammetry in oxygen saturated electrolytes. The acetonitrile is chemisorbed on Pt over a wide potential range, inhibiting both hydrogen adsorption and oxide formation. The extent of AcN chemisorption depends on its concentration in the solution. The initial potential of oxygen reduction is shifted negatively, while the ORR current is increasingly reduced with the increase of AcN concentration. Complete inhibition of ORR in the potential range of AcN and Cl anion coadsorption is achieved for a 0.1 M NaCl + 1 M AcN solution.
T2  - Hemijska industrija
T1  - Inhibiting effect of acetonitrile on oxygen reduction on polycrystalline Pt electrode in sodium chloride solution
VL  - 66
IS  - 3
SP  - 327
EP  - 333
DO  - 10.2298/HEMIND111010097S
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Srejić, Irina and Marinovic, Vedrana M. and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2012",
abstract = "The oxygen reduction reaction (ORR) was studied on a polycrystalline Pt electrode in 0.1 M NaCl electrolyte containing various amounts of acetonitrile (AcN). The state of the electrode surface was characterized by cyclic voltammetry in oxygen free electrolytes, while ORR studies were performed on a polycrystalline Pt rotating disc electrode by linear sweep voltammetry in oxygen saturated electrolytes. The acetonitrile is chemisorbed on Pt over a wide potential range, inhibiting both hydrogen adsorption and oxide formation. The extent of AcN chemisorption depends on its concentration in the solution. The initial potential of oxygen reduction is shifted negatively, while the ORR current is increasingly reduced with the increase of AcN concentration. Complete inhibition of ORR in the potential range of AcN and Cl anion coadsorption is achieved for a 0.1 M NaCl + 1 M AcN solution.",
journal = "Hemijska industrija",
title = "Inhibiting effect of acetonitrile on oxygen reduction on polycrystalline Pt electrode in sodium chloride solution",
volume = "66",
number = "3",
pages = "327-333",
doi = "10.2298/HEMIND111010097S"
}

Smiljanić, M. Lj., Srejić, I., Marinovic, V. M., Rakočević, Z. Lj.,& Štrbac, S.. (2012). Inhibiting effect of acetonitrile on oxygen reduction on polycrystalline Pt electrode in sodium chloride solution. in Hemijska industrija, 66(3), 327-333.
https://doi.org/10.2298/HEMIND111010097S

Smiljanić ML, Srejić I, Marinovic VM, Rakočević ZL, Štrbac S. Inhibiting effect of acetonitrile on oxygen reduction on polycrystalline Pt electrode in sodium chloride solution. in Hemijska industrija. 2012;66(3):327-333.
doi:10.2298/HEMIND111010097S .

Smiljanić, Milutin Lj., Srejić, Irina, Marinovic, Vedrana M., Rakočević, Zlatko Lj., Štrbac, Svetlana, "Inhibiting effect of acetonitrile on oxygen reduction on polycrystalline Pt electrode in sodium chloride solution" in Hemijska industrija, 66, no. 3 (2012):327-333,
https://doi.org/10.2298/HEMIND111010097S . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Srejić, Irina
AU  - Grgur, Branimir
AU  - Rakočević, Zlatko Lj.
AU  - Štrbac, Svetlana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5217
AB  - Hydrogen evolution reaction was studied on Au(111) modified by palladium spontaneously deposited on the Au(111) surface from (1 mM PdSO4 center dot 2 H2O + 0.5 M H2SO4) solution at a submonolayer coverage. Number and size of Pd islands increased with the increase of the deposition time as observed by ex situ surface topography atomic force microscopy (AFM). The overall coverage of the underlying Au(111) surface by the deposited Pd islands was estimated from simultaneously acquired phase AFM images, which provided a clear contrast between different materials. The obtained Pd/Au(111) surfaces have shown a significant catalytic activity toward hydrogen evolution reaction in 0.5 M H2SO4 solution. This is discussed with respect to Pd islands size and coverage and to the influence of an electronic effect induced in Pd islands by the underlying Au(111) substrate.
T2  - Electrocatalysis
T1  - Catalysis of Hydrogen Evolution on Au(111) Modified by Spontaneously Deposited Pd Nanoislands
VL  - 3
IS  - 3-4
SP  - 369
EP  - 375
DO  - 10.1007/s12678-012-0093-2
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Srejić, Irina and Grgur, Branimir and Rakočević, Zlatko Lj. and Štrbac, Svetlana",
year = "2012",
abstract = "Hydrogen evolution reaction was studied on Au(111) modified by palladium spontaneously deposited on the Au(111) surface from (1 mM PdSO4 center dot 2 H2O + 0.5 M H2SO4) solution at a submonolayer coverage. Number and size of Pd islands increased with the increase of the deposition time as observed by ex situ surface topography atomic force microscopy (AFM). The overall coverage of the underlying Au(111) surface by the deposited Pd islands was estimated from simultaneously acquired phase AFM images, which provided a clear contrast between different materials. The obtained Pd/Au(111) surfaces have shown a significant catalytic activity toward hydrogen evolution reaction in 0.5 M H2SO4 solution. This is discussed with respect to Pd islands size and coverage and to the influence of an electronic effect induced in Pd islands by the underlying Au(111) substrate.",
journal = "Electrocatalysis",
title = "Catalysis of Hydrogen Evolution on Au(111) Modified by Spontaneously Deposited Pd Nanoislands",
volume = "3",
number = "3-4",
pages = "369-375",
doi = "10.1007/s12678-012-0093-2"
}

Smiljanić, M. Lj., Srejić, I., Grgur, B., Rakočević, Z. Lj.,& Štrbac, S.. (2012). Catalysis of Hydrogen Evolution on Au(111) Modified by Spontaneously Deposited Pd Nanoislands. in Electrocatalysis, 3(3-4), 369-375.
https://doi.org/10.1007/s12678-012-0093-2

Smiljanić ML, Srejić I, Grgur B, Rakočević ZL, Štrbac S. Catalysis of Hydrogen Evolution on Au(111) Modified by Spontaneously Deposited Pd Nanoislands. in Electrocatalysis. 2012;3(3-4):369-375.
doi:10.1007/s12678-012-0093-2 .

Smiljanić, Milutin Lj., Srejić, Irina, Grgur, Branimir, Rakočević, Zlatko Lj., Štrbac, Svetlana, "Catalysis of Hydrogen Evolution on Au(111) Modified by Spontaneously Deposited Pd Nanoislands" in Electrocatalysis, 3, no. 3-4 (2012):369-375,
https://doi.org/10.1007/s12678-012-0093-2 . .