TY  - JOUR
AU  - Elessawy, Noha A.
AU  - Backović, Gordana
AU  - Hirunthanawat, Janesuda
AU  - Martins, Marta
AU  - Rakočević, Lazar
AU  - Gouda, Marwa H.
AU  - Toghan, Arafat
AU  - Youssef, Mohamed E.
AU  - Šljukić, Biljana
AU  - Santos, Diogo M. F.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10847
AB  - Direct liquid fuel cells represent one of the most rapidly emerging energy conversion devices. The main challenge in developing fuel cell devices is finding low-cost and highly active catalysts. In this work, PET bottle waste was transformed into nitrogen-doped graphene (NG) as valuable catalyst support. NG was prepared by a one-pot thermal decomposition process of mineral water waste bottles with urea at 800 °C. Then, NG/Pt electrocatalysts with Pt loadings as low as 0.9 wt.% and 1.8 wt.% were prepared via a simple reduction method in aqueous solution at room temperature. The physical and electrochemical properties of the NG/Pt electrocatalysts are characterized and evaluated for application in direct borohydride peroxide fuel cells (DBPFCs). The results show that NG/Pt catalysts display catalytic activity for borohydride oxidation reaction, particularly the NG/Pt_1, with a number of exchanged electrons of 2.7. Using NG/Pt composite in fuel cells is anticipated to lower prices and boost the usage of electrochemical energy devices. A DBPFC fuel cell using NG/Pt_1 catalyst (1.8 wt.% Pt) in the anode achieved a power density of 75 mW cm−2 at 45 °C. The exceptional performance and economic viability become even more evident when expressed as mass-specific power density, reaching a value as high as 15.8 W mgPt−1.
T2  - Catalysts
T1  - From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells
VL  - 13
IS  - 3
SP  - 525
DO  - 10.3390/catal13030525
ER  - 

@article{
author = "Elessawy, Noha A. and Backović, Gordana and Hirunthanawat, Janesuda and Martins, Marta and Rakočević, Lazar and Gouda, Marwa H. and Toghan, Arafat and Youssef, Mohamed E. and Šljukić, Biljana and Santos, Diogo M. F.",
year = "2023",
abstract = "Direct liquid fuel cells represent one of the most rapidly emerging energy conversion devices. The main challenge in developing fuel cell devices is finding low-cost and highly active catalysts. In this work, PET bottle waste was transformed into nitrogen-doped graphene (NG) as valuable catalyst support. NG was prepared by a one-pot thermal decomposition process of mineral water waste bottles with urea at 800 °C. Then, NG/Pt electrocatalysts with Pt loadings as low as 0.9 wt.% and 1.8 wt.% were prepared via a simple reduction method in aqueous solution at room temperature. The physical and electrochemical properties of the NG/Pt electrocatalysts are characterized and evaluated for application in direct borohydride peroxide fuel cells (DBPFCs). The results show that NG/Pt catalysts display catalytic activity for borohydride oxidation reaction, particularly the NG/Pt_1, with a number of exchanged electrons of 2.7. Using NG/Pt composite in fuel cells is anticipated to lower prices and boost the usage of electrochemical energy devices. A DBPFC fuel cell using NG/Pt_1 catalyst (1.8 wt.% Pt) in the anode achieved a power density of 75 mW cm−2 at 45 °C. The exceptional performance and economic viability become even more evident when expressed as mass-specific power density, reaching a value as high as 15.8 W mgPt−1.",
journal = "Catalysts",
title = "From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells",
volume = "13",
number = "3",
pages = "525",
doi = "10.3390/catal13030525"
}

Elessawy, N. A., Backović, G., Hirunthanawat, J., Martins, M., Rakočević, L., Gouda, M. H., Toghan, A., Youssef, M. E., Šljukić, B.,& Santos, D. M. F.. (2023). From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells. in Catalysts, 13(3), 525.
https://doi.org/10.3390/catal13030525

Elessawy NA, Backović G, Hirunthanawat J, Martins M, Rakočević L, Gouda MH, Toghan A, Youssef ME, Šljukić B, Santos DMF. From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells. in Catalysts. 2023;13(3):525.
doi:10.3390/catal13030525 .

Elessawy, Noha A., Backović, Gordana, Hirunthanawat, Janesuda, Martins, Marta, Rakočević, Lazar, Gouda, Marwa H., Toghan, Arafat, Youssef, Mohamed E., Šljukić, Biljana, Santos, Diogo M. F., "From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells" in Catalysts, 13, no. 3 (2023):525,
https://doi.org/10.3390/catal13030525 . .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Tapia, Andres
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Otoničar, Mojca
AU  - Škapin, Srečo Davor
AU  - Santos, Diogo M. F.
AU  - Šljukić, Biljana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10436
AB  - Gold polypyrrole (AuPPy) and copper polypyrrole (CuPPy) nanocomposites were prepared by a simple one-step in situ oxidative polymerization of pyrrole monomer by Au3+ and Cu2+ ions. Owing to their characteristic physicochemical properties confirmed by optical and structural characterization methods, the behavior of these materials as electrocatalysts for borohydride oxidation reaction (BOR) was considered. BOR apparent activation energy was found to be 16 and 22 kJ mol−1 for AuPPy and CuPPy electrocatalyst, respectively. The stability of the two electrocatalysts was assessed by chronoamperometry. Moreover, fuel cell tests were carried out with AuPPy and CuPPy as anode electrocatalyst of a direct borohydride-peroxide fuel cell (DBPFC). Open circuit voltage (OCV) of 1.30 V was obtained with both AuPPy and CuPPy, with the OCV increasing to 1.45 V upon adding a small amount of carbon (AuPPy-C). The peak power density of a DBPFC with BOR at AuPPy-C anode and hydrogen peroxide reduction reaction at Pt cathode was found to be ca. 162 mW cm−2 at 65 °C.
T2  - International Journal of Hydrogen Energy
T1  - High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications
DO  - 10.1016/j.ijhydene.2022.08.229
ER  - 

@article{
author = "Milikić, Jadranka and Tapia, Andres and Stamenović, Una and Vodnik, Vesna and Otoničar, Mojca and Škapin, Srečo Davor and Santos, Diogo M. F. and Šljukić, Biljana",
year = "2022",
abstract = "Gold polypyrrole (AuPPy) and copper polypyrrole (CuPPy) nanocomposites were prepared by a simple one-step in situ oxidative polymerization of pyrrole monomer by Au3+ and Cu2+ ions. Owing to their characteristic physicochemical properties confirmed by optical and structural characterization methods, the behavior of these materials as electrocatalysts for borohydride oxidation reaction (BOR) was considered. BOR apparent activation energy was found to be 16 and 22 kJ mol−1 for AuPPy and CuPPy electrocatalyst, respectively. The stability of the two electrocatalysts was assessed by chronoamperometry. Moreover, fuel cell tests were carried out with AuPPy and CuPPy as anode electrocatalyst of a direct borohydride-peroxide fuel cell (DBPFC). Open circuit voltage (OCV) of 1.30 V was obtained with both AuPPy and CuPPy, with the OCV increasing to 1.45 V upon adding a small amount of carbon (AuPPy-C). The peak power density of a DBPFC with BOR at AuPPy-C anode and hydrogen peroxide reduction reaction at Pt cathode was found to be ca. 162 mW cm−2 at 65 °C.",
journal = "International Journal of Hydrogen Energy",
title = "High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications",
doi = "10.1016/j.ijhydene.2022.08.229"
}

Milikić, J., Tapia, A., Stamenović, U., Vodnik, V., Otoničar, M., Škapin, S. D., Santos, D. M. F.,& Šljukić, B.. (2022). High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications. in International Journal of Hydrogen Energy.
https://doi.org/10.1016/j.ijhydene.2022.08.229

Milikić J, Tapia A, Stamenović U, Vodnik V, Otoničar M, Škapin SD, Santos DMF, Šljukić B. High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications. in International Journal of Hydrogen Energy. 2022;.
doi:10.1016/j.ijhydene.2022.08.229 .

Milikić, Jadranka, Tapia, Andres, Stamenović, Una, Vodnik, Vesna, Otoničar, Mojca, Škapin, Srečo Davor, Santos, Diogo M. F., Šljukić, Biljana, "High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications" in International Journal of Hydrogen Energy (2022),
https://doi.org/10.1016/j.ijhydene.2022.08.229 . .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Oliveira, Raisa Costa Paes
AU  - Tapia, Andres
AU  - Santos, Diogo M.F.
AU  - Zdolšek, Nikola
AU  - Trtić-Petrović, Tatjana M.
AU  - Vraneš, Milan
AU  - Šljukić, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9801
AB  - Three different carbon-supported metal (gold, platinum, nickel) nanoparticle (M/c-IL) electrocatalysts are prepared by template-free carbonization of the corresponding ionic liquids, namely [Hmim][AuCl4 ], [Hmim]2 [PtCl4 ], and [C16mim]2 [NiCl4 ], as confirmed by X-ray diffraction analysis, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and Raman spectroscopy. The electrochemical investigation of borohydride oxidation reaction (BOR) at the three electrocatalysts by cyclic voltammetry reveals different behavior for each material. BOR is found to be a first-order reaction at the three electrocatalysts, with an apparent activation energy of 10.6 and 13.8 kJ mol−1 for Pt/c-IL and Au/c-IL electrocatalysts, respectively. A number of exchanged electrons of 5.0, 2.4, and 2.0 is obtained for BOR at Pt/c-IL, Au/c-IL, and Ni/c-IL electrodes, respectively. Direct borohydride-peroxide fuel cell (DBPFC) tests done at temperatures in the 25–65◦C range show ca. four times higher power density when using a Pt/c-IL anode than with an Au/c-IL anode. Peak power densities of 40.6 and 120.5 mW cm−2 are achieved at 25 and 65◦C, respectively, for DBPFC with a Pt/c-IL anode electrocatalyst. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
T2  - Catalysts
T1  - Ionic liquid-derived carbon-supported metal electrocatalysts as anodes in direct borohydride-peroxide fuel cells
VL  - 11
IS  - 5
DO  - 10.3390/catal11050632
ER  - 

@article{
author = "Milikić, Jadranka and Oliveira, Raisa Costa Paes and Tapia, Andres and Santos, Diogo M.F. and Zdolšek, Nikola and Trtić-Petrović, Tatjana M. and Vraneš, Milan and Šljukić, Biljana",
year = "2021",
abstract = "Three different carbon-supported metal (gold, platinum, nickel) nanoparticle (M/c-IL) electrocatalysts are prepared by template-free carbonization of the corresponding ionic liquids, namely [Hmim][AuCl4 ], [Hmim]2 [PtCl4 ], and [C16mim]2 [NiCl4 ], as confirmed by X-ray diffraction analysis, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and Raman spectroscopy. The electrochemical investigation of borohydride oxidation reaction (BOR) at the three electrocatalysts by cyclic voltammetry reveals different behavior for each material. BOR is found to be a first-order reaction at the three electrocatalysts, with an apparent activation energy of 10.6 and 13.8 kJ mol−1 for Pt/c-IL and Au/c-IL electrocatalysts, respectively. A number of exchanged electrons of 5.0, 2.4, and 2.0 is obtained for BOR at Pt/c-IL, Au/c-IL, and Ni/c-IL electrodes, respectively. Direct borohydride-peroxide fuel cell (DBPFC) tests done at temperatures in the 25–65◦C range show ca. four times higher power density when using a Pt/c-IL anode than with an Au/c-IL anode. Peak power densities of 40.6 and 120.5 mW cm−2 are achieved at 25 and 65◦C, respectively, for DBPFC with a Pt/c-IL anode electrocatalyst. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).",
journal = "Catalysts",
title = "Ionic liquid-derived carbon-supported metal electrocatalysts as anodes in direct borohydride-peroxide fuel cells",
volume = "11",
number = "5",
doi = "10.3390/catal11050632"
}

Milikić, J., Oliveira, R. C. P., Tapia, A., Santos, D. M.F., Zdolšek, N., Trtić-Petrović, T. M., Vraneš, M.,& Šljukić, B.. (2021). Ionic liquid-derived carbon-supported metal electrocatalysts as anodes in direct borohydride-peroxide fuel cells. in Catalysts, 11(5).
https://doi.org/10.3390/catal11050632

Milikić J, Oliveira RCP, Tapia A, Santos DM, Zdolšek N, Trtić-Petrović TM, Vraneš M, Šljukić B. Ionic liquid-derived carbon-supported metal electrocatalysts as anodes in direct borohydride-peroxide fuel cells. in Catalysts. 2021;11(5).
doi:10.3390/catal11050632 .

Milikić, Jadranka, Oliveira, Raisa Costa Paes, Tapia, Andres, Santos, Diogo M.F., Zdolšek, Nikola, Trtić-Petrović, Tatjana M., Vraneš, Milan, Šljukić, Biljana, "Ionic liquid-derived carbon-supported metal electrocatalysts as anodes in direct borohydride-peroxide fuel cells" in Catalysts, 11, no. 5 (2021),
https://doi.org/10.3390/catal11050632 . .