TY  - JOUR
AU  - Tasić, Gvozden S.
AU  - Lacnjevac, Uros
AU  - Tasić, Marijana M.
AU  - Marčeta Kaninski, Milica
AU  - Nikolić, Vladimir M.
AU  - Žugić, Dragana
AU  - Jovic, Vladimir D.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5510
AB  - In this study, different Ni-W coatings, obtained by cheap and technologically simple electrodeposition method, were examined as potential electrocatalysts for the hydrogen evolution reaction (HER). All electrodepositions were done on a Ni mesh substrate from ammoniacal-citrate bath containing different concentrations of Na2WO4. The influence of deposition parameters, such as deposition current density, pH and composition of ammoniacal-citrate bath on electrocatalytic activity of obtained Ni-W coatings toward HER was examined by polarization curve measurements in 6 M KOH at room temperature. The morphology and tungsten content of the Ni-W coatings were investigated by means of SEM and EDS analysis. All investigated electrodes have shown high electrocatalytic activity for the HER. The samples obtained at higher deposition current densities had the lowest overvoltage for the HER. It has been shown that the plating bath pH value is very important parameter in obtaining active coatings. Results of the analysis of polarization curves, morphology of deposited Ni-W coatings and the content of tungsten in the coatings, indicate that the surface roughness of the coatings is responsible for their catalytic activity towards HER. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Influence of electrodeposition parameters of Ni-W on Ni cathode for alkaline water electrolyser
VL  - 38
IS  - 11
SP  - 4291
EP  - 4297
DO  - 10.1016/j.ijhydene.2013.01.193
ER  - 

@article{
author = "Tasić, Gvozden S. and Lacnjevac, Uros and Tasić, Marijana M. and Marčeta Kaninski, Milica and Nikolić, Vladimir M. and Žugić, Dragana and Jovic, Vladimir D.",
year = "2013",
abstract = "In this study, different Ni-W coatings, obtained by cheap and technologically simple electrodeposition method, were examined as potential electrocatalysts for the hydrogen evolution reaction (HER). All electrodepositions were done on a Ni mesh substrate from ammoniacal-citrate bath containing different concentrations of Na2WO4. The influence of deposition parameters, such as deposition current density, pH and composition of ammoniacal-citrate bath on electrocatalytic activity of obtained Ni-W coatings toward HER was examined by polarization curve measurements in 6 M KOH at room temperature. The morphology and tungsten content of the Ni-W coatings were investigated by means of SEM and EDS analysis. All investigated electrodes have shown high electrocatalytic activity for the HER. The samples obtained at higher deposition current densities had the lowest overvoltage for the HER. It has been shown that the plating bath pH value is very important parameter in obtaining active coatings. Results of the analysis of polarization curves, morphology of deposited Ni-W coatings and the content of tungsten in the coatings, indicate that the surface roughness of the coatings is responsible for their catalytic activity towards HER. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Influence of electrodeposition parameters of Ni-W on Ni cathode for alkaline water electrolyser",
volume = "38",
number = "11",
pages = "4291-4297",
doi = "10.1016/j.ijhydene.2013.01.193"
}

Tasić, G. S., Lacnjevac, U., Tasić, M. M., Marčeta Kaninski, M., Nikolić, V. M., Žugić, D.,& Jovic, V. D.. (2013). Influence of electrodeposition parameters of Ni-W on Ni cathode for alkaline water electrolyser. in International Journal of Hydrogen Energy, 38(11), 4291-4297.
https://doi.org/10.1016/j.ijhydene.2013.01.193

Tasić GS, Lacnjevac U, Tasić MM, Marčeta Kaninski M, Nikolić VM, Žugić D, Jovic VD. Influence of electrodeposition parameters of Ni-W on Ni cathode for alkaline water electrolyser. in International Journal of Hydrogen Energy. 2013;38(11):4291-4297.
doi:10.1016/j.ijhydene.2013.01.193 .

Tasić, Gvozden S., Lacnjevac, Uros, Tasić, Marijana M., Marčeta Kaninski, Milica, Nikolić, Vladimir M., Žugić, Dragana, Jovic, Vladimir D., "Influence of electrodeposition parameters of Ni-W on Ni cathode for alkaline water electrolyser" in International Journal of Hydrogen Energy, 38, no. 11 (2013):4291-4297,
https://doi.org/10.1016/j.ijhydene.2013.01.193 . .

TY  - JOUR
AU  - Krstajic, Mila N.
AU  - Obradović, Maja D.
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir
AU  - Lacnjevac, Uros C.
AU  - Krstajic, Nedeljko V.
AU  - Gojković, Snežana Lj.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5829
AB  - Ru-doped SnO2 powder, (RuxSn1-x)O-2, with a Sn:Ru atomic ratio of 9:1 was synthesized and used as a support for Pt nanoparticles (30 mass % loading). The (RuxSn1-x)O-2 support and the Pt/(RuxSn1-x)O-2 catalyst were characterized by X-ray diffraction measurements, energy dispersive X-ray spectroscopy and transmission electron microscopy (TEM). The (RuxSn1-x)O-2 was found to be a two-phase material consisting of probably a solid solution of RuO2 in SnO2 and pure RuO2. The average Pt particle size determined by TEM was 5.3 nm. Cyclic voltammetry of Pt/(RuxSn1-x)O-2 indicated good conductivity of the support and displayed the usual features of Pt. The results of the electrochemical oxidation of COad, and methanol on Pt/(RuxSn1-x)O-2 were compared with those on commercial Pt/C and PtRu/C catalysts. Oxidation of COads on Pt/(RuxSn1-x)O-2 starts at lower positive potentials than on PtRu/C and Pt/C. Potentiodynamic polarization curves and chronoamperometric curves of methanol oxidation indicated higher initial activity of the Pt/(RuxSn1-x)O-2 catalyst compared to PtRu/C, but also a greater loss in current density over time. A potentiodynamic stability test of the catalysts revealed that deactivation of Pt/(RuxSn1-x)O-2 and Pt/C was primarily caused by poisoning of the Pt surface by residues of methanol oxidation, which mostly occurred during the first potential cycle. In the case of PtRu/C, the poisoning of the surface was minor and deactivation was caused by surface area loss of the PtRu.
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O-2 nanocatalyst
VL  - 78
IS  - 11
SP  - 1703
EP  - 1716
DO  - 10.2298/JSC130718091K
ER  - 

@article{
author = "Krstajic, Mila N. and Obradović, Maja D. and Babić, Biljana M. and Radmilović, Velimir and Lacnjevac, Uros C. and Krstajic, Nedeljko V. and Gojković, Snežana Lj.",
year = "2013",
abstract = "Ru-doped SnO2 powder, (RuxSn1-x)O-2, with a Sn:Ru atomic ratio of 9:1 was synthesized and used as a support for Pt nanoparticles (30 mass % loading). The (RuxSn1-x)O-2 support and the Pt/(RuxSn1-x)O-2 catalyst were characterized by X-ray diffraction measurements, energy dispersive X-ray spectroscopy and transmission electron microscopy (TEM). The (RuxSn1-x)O-2 was found to be a two-phase material consisting of probably a solid solution of RuO2 in SnO2 and pure RuO2. The average Pt particle size determined by TEM was 5.3 nm. Cyclic voltammetry of Pt/(RuxSn1-x)O-2 indicated good conductivity of the support and displayed the usual features of Pt. The results of the electrochemical oxidation of COad, and methanol on Pt/(RuxSn1-x)O-2 were compared with those on commercial Pt/C and PtRu/C catalysts. Oxidation of COads on Pt/(RuxSn1-x)O-2 starts at lower positive potentials than on PtRu/C and Pt/C. Potentiodynamic polarization curves and chronoamperometric curves of methanol oxidation indicated higher initial activity of the Pt/(RuxSn1-x)O-2 catalyst compared to PtRu/C, but also a greater loss in current density over time. A potentiodynamic stability test of the catalysts revealed that deactivation of Pt/(RuxSn1-x)O-2 and Pt/C was primarily caused by poisoning of the Pt surface by residues of methanol oxidation, which mostly occurred during the first potential cycle. In the case of PtRu/C, the poisoning of the surface was minor and deactivation was caused by surface area loss of the PtRu.",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O-2 nanocatalyst",
volume = "78",
number = "11",
pages = "1703-1716",
doi = "10.2298/JSC130718091K"
}

Krstajic, M. N., Obradović, M. D., Babić, B. M., Radmilović, V., Lacnjevac, U. C., Krstajic, N. V.,& Gojković, S. Lj.. (2013). Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O-2 nanocatalyst. in Journal of the Serbian Chemical Society, 78(11), 1703-1716.
https://doi.org/10.2298/JSC130718091K

Krstajic MN, Obradović MD, Babić BM, Radmilović V, Lacnjevac UC, Krstajic NV, Gojković SL. Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O-2 nanocatalyst. in Journal of the Serbian Chemical Society. 2013;78(11):1703-1716.
doi:10.2298/JSC130718091K .

Krstajic, Mila N., Obradović, Maja D., Babić, Biljana M., Radmilović, Velimir, Lacnjevac, Uros C., Krstajic, Nedeljko V., Gojković, Snežana Lj., "Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O-2 nanocatalyst" in Journal of the Serbian Chemical Society, 78, no. 11 (2013):1703-1716,
https://doi.org/10.2298/JSC130718091K . .

TY  - JOUR
AU  - Bucko, M.
AU  - Rogan, Jelena R.
AU  - Jokić, Bojan M.
AU  - Mitrić, Miodrag
AU  - Lacnjevac, U.
AU  - Bajat, Jelena B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5548
AB  - The Zn-Mn alloy electrodeposition on a steel electrode in chloride electrolyte was investigated with the aim of obtaining deposits with as high as possible Mn percent. It was found that the deposition current density and concentration of Mn2+ ion in the chloride electrolyte significantly affect the Mn content in the alloy coating as well as the coating surface morphology. There was a transition from dendritic and spongy to smooth, bright, and amorphous structure of Zn-Mn deposits, when some critical deposition current density was reached, probably due to the metal oxyhydroxide inclusion in the coatings. Several plating additives were tested in order to decrease the hydroxide content and to improve surface appearance of the deposits. The 4-hydroxy-benzaldehyde was found to decrease oxygen and increase Mn percent in the coatings, and to significantly improve their surface morphology.
T2  - Journal of Solid State Electrochemistry
T1  - Electrodeposition of Zn-Mn alloys at high current densities from chloride electrolyte
VL  - 17
IS  - 5
SP  - 1409
EP  - 1419
DO  - 10.1007/s10008-013-2004-8
ER  - 

@article{
author = "Bucko, M. and Rogan, Jelena R. and Jokić, Bojan M. and Mitrić, Miodrag and Lacnjevac, U. and Bajat, Jelena B.",
year = "2013",
abstract = "The Zn-Mn alloy electrodeposition on a steel electrode in chloride electrolyte was investigated with the aim of obtaining deposits with as high as possible Mn percent. It was found that the deposition current density and concentration of Mn2+ ion in the chloride electrolyte significantly affect the Mn content in the alloy coating as well as the coating surface morphology. There was a transition from dendritic and spongy to smooth, bright, and amorphous structure of Zn-Mn deposits, when some critical deposition current density was reached, probably due to the metal oxyhydroxide inclusion in the coatings. Several plating additives were tested in order to decrease the hydroxide content and to improve surface appearance of the deposits. The 4-hydroxy-benzaldehyde was found to decrease oxygen and increase Mn percent in the coatings, and to significantly improve their surface morphology.",
journal = "Journal of Solid State Electrochemistry",
title = "Electrodeposition of Zn-Mn alloys at high current densities from chloride electrolyte",
volume = "17",
number = "5",
pages = "1409-1419",
doi = "10.1007/s10008-013-2004-8"
}

Bucko, M., Rogan, J. R., Jokić, B. M., Mitrić, M., Lacnjevac, U.,& Bajat, J. B.. (2013). Electrodeposition of Zn-Mn alloys at high current densities from chloride electrolyte. in Journal of Solid State Electrochemistry, 17(5), 1409-1419.
https://doi.org/10.1007/s10008-013-2004-8

Bucko M, Rogan JR, Jokić BM, Mitrić M, Lacnjevac U, Bajat JB. Electrodeposition of Zn-Mn alloys at high current densities from chloride electrolyte. in Journal of Solid State Electrochemistry. 2013;17(5):1409-1419.
doi:10.1007/s10008-013-2004-8 .

Bucko, M., Rogan, Jelena R., Jokić, Bojan M., Mitrić, Miodrag, Lacnjevac, U., Bajat, Jelena B., "Electrodeposition of Zn-Mn alloys at high current densities from chloride electrolyte" in Journal of Solid State Electrochemistry, 17, no. 5 (2013):1409-1419,
https://doi.org/10.1007/s10008-013-2004-8 . .

TY  - JOUR
AU  - Lacnjevac, U.
AU  - Jovic, B. M.
AU  - Maksimović, Vesna
AU  - Jović, Vladimir D.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3896
AB  - The electrodeposition of the Fe-Ni powders from citrate-ammonium chloride containing electrolytes for different Ni/Fe ions concentration ratios at pH 4.0 was investigated by the polarization measurements. The morphology, chemical composition, and phase composition of the obtained powders were investigated using SEM, EDS, and XRD analysis. EDS analysis of as-deposited alloy powders confirmed anomalous co-deposition of Fe and Ni. A common characteristic for all as-deposited powder samples was the presence of cone-shaped cavities and nodules on the big agglomerates of the order of 200-400 mu m. After annealing in air at 400, 600, and 700 A degrees C for 3 h, all alloy powders oxidized forming NiO, NiFe2O4, and Fe2O3 phases in different proportions depending on the original powder composition. The NiFe2O4 phase was found to be dominant in the sample with the highest percentage of Fe after annealing at 600 A degrees C.
T2  - Journal of Applied Electrochemistry
T1  - An attempt to produce NiFe2O4 powder from electrodeposited Fe-Ni alloy powders by subsequent recrystallization in air
VL  - 40
IS  - 3
SP  - 701
EP  - 708
DO  - 10.1007/s10800-009-0047-4
ER  - 

@article{
author = "Lacnjevac, U. and Jovic, B. M. and Maksimović, Vesna and Jović, Vladimir D.",
year = "2010",
abstract = "The electrodeposition of the Fe-Ni powders from citrate-ammonium chloride containing electrolytes for different Ni/Fe ions concentration ratios at pH 4.0 was investigated by the polarization measurements. The morphology, chemical composition, and phase composition of the obtained powders were investigated using SEM, EDS, and XRD analysis. EDS analysis of as-deposited alloy powders confirmed anomalous co-deposition of Fe and Ni. A common characteristic for all as-deposited powder samples was the presence of cone-shaped cavities and nodules on the big agglomerates of the order of 200-400 mu m. After annealing in air at 400, 600, and 700 A degrees C for 3 h, all alloy powders oxidized forming NiO, NiFe2O4, and Fe2O3 phases in different proportions depending on the original powder composition. The NiFe2O4 phase was found to be dominant in the sample with the highest percentage of Fe after annealing at 600 A degrees C.",
journal = "Journal of Applied Electrochemistry",
title = "An attempt to produce NiFe2O4 powder from electrodeposited Fe-Ni alloy powders by subsequent recrystallization in air",
volume = "40",
number = "3",
pages = "701-708",
doi = "10.1007/s10800-009-0047-4"
}

Lacnjevac, U., Jovic, B. M., Maksimović, V.,& Jović, V. D.. (2010). An attempt to produce NiFe2O4 powder from electrodeposited Fe-Ni alloy powders by subsequent recrystallization in air. in Journal of Applied Electrochemistry, 40(3), 701-708.
https://doi.org/10.1007/s10800-009-0047-4

Lacnjevac U, Jovic BM, Maksimović V, Jović VD. An attempt to produce NiFe2O4 powder from electrodeposited Fe-Ni alloy powders by subsequent recrystallization in air. in Journal of Applied Electrochemistry. 2010;40(3):701-708.
doi:10.1007/s10800-009-0047-4 .

Lacnjevac, U., Jovic, B. M., Maksimović, Vesna, Jović, Vladimir D., "An attempt to produce NiFe2O4 powder from electrodeposited Fe-Ni alloy powders by subsequent recrystallization in air" in Journal of Applied Electrochemistry, 40, no. 3 (2010):701-708,
https://doi.org/10.1007/s10800-009-0047-4 . .

TY  - JOUR
AU  - Lacnjevac, U.
AU  - Jovic, B. M.
AU  - Baščarević, Zvezdana D.
AU  - Maksimović, Vesna
AU  - Jović, Vladimir D.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3681
AB  - The Ni-Mo-O alloy powders were electrodeposited from ammonium sulfate containing electrolytes for different Ni/Mo ions concentration ratios. Electrodeposition was investigated by the polarization measurements. The morphology, chemical composition and phase composition of these powders were investigated using SEM, EDS, AAS and XRD analysis. The EDS and AAS analysis showed that the powder composition depends on the Ni/Mo ions concentration ratio, with the Ni/Mo metals ratio in the powders being the same as the one in the solution. The as-deposited alloy powders were nanocrystalline, while after stepwise annealing at 300, 400, 500 and 600 degrees C for 2 h in N(2) atmosphere their crystallinity became more and more pronounced, with the dimension of crystallites increasing with the increase of the annealing temperature. Already after the annealing at 300 degrees C the presence of two phases, MoO(3) and NiMoO(4), was identified by XRD, while SEM analysis showed that the surfaces of powder particles were partially recrystallized. With the increase of the annealing temperature the amount of the NiMoO(4) was found to increase in all powders. For the powder electrodeposited from the solution with the highest Ni/Mo ratio (1/0.3) NiMoO(4) phase was detected together with a small amount of Ni(4)Mo phase, indicating phase transition of MoO(3) into NiMoO(4) (and probably Ni(4)Mo) at the temperature of 600 degrees C. (c) 2008 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - Morphology and phase composition of as-deposited and recrystallized Ni-Mo-O powders
VL  - 54
IS  - 11
SP  - 3115
EP  - 3123
DO  - 10.1016/j.electacta.2008.11.068
ER  - 

@article{
author = "Lacnjevac, U. and Jovic, B. M. and Baščarević, Zvezdana D. and Maksimović, Vesna and Jović, Vladimir D.",
year = "2009",
abstract = "The Ni-Mo-O alloy powders were electrodeposited from ammonium sulfate containing electrolytes for different Ni/Mo ions concentration ratios. Electrodeposition was investigated by the polarization measurements. The morphology, chemical composition and phase composition of these powders were investigated using SEM, EDS, AAS and XRD analysis. The EDS and AAS analysis showed that the powder composition depends on the Ni/Mo ions concentration ratio, with the Ni/Mo metals ratio in the powders being the same as the one in the solution. The as-deposited alloy powders were nanocrystalline, while after stepwise annealing at 300, 400, 500 and 600 degrees C for 2 h in N(2) atmosphere their crystallinity became more and more pronounced, with the dimension of crystallites increasing with the increase of the annealing temperature. Already after the annealing at 300 degrees C the presence of two phases, MoO(3) and NiMoO(4), was identified by XRD, while SEM analysis showed that the surfaces of powder particles were partially recrystallized. With the increase of the annealing temperature the amount of the NiMoO(4) was found to increase in all powders. For the powder electrodeposited from the solution with the highest Ni/Mo ratio (1/0.3) NiMoO(4) phase was detected together with a small amount of Ni(4)Mo phase, indicating phase transition of MoO(3) into NiMoO(4) (and probably Ni(4)Mo) at the temperature of 600 degrees C. (c) 2008 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "Morphology and phase composition of as-deposited and recrystallized Ni-Mo-O powders",
volume = "54",
number = "11",
pages = "3115-3123",
doi = "10.1016/j.electacta.2008.11.068"
}

Lacnjevac, U., Jovic, B. M., Baščarević, Z. D., Maksimović, V.,& Jović, V. D.. (2009). Morphology and phase composition of as-deposited and recrystallized Ni-Mo-O powders. in Electrochimica Acta, 54(11), 3115-3123.
https://doi.org/10.1016/j.electacta.2008.11.068

Lacnjevac U, Jovic BM, Baščarević ZD, Maksimović V, Jović VD. Morphology and phase composition of as-deposited and recrystallized Ni-Mo-O powders. in Electrochimica Acta. 2009;54(11):3115-3123.
doi:10.1016/j.electacta.2008.11.068 .

Lacnjevac, U., Jovic, B. M., Baščarević, Zvezdana D., Maksimović, Vesna, Jović, Vladimir D., "Morphology and phase composition of as-deposited and recrystallized Ni-Mo-O powders" in Electrochimica Acta, 54, no. 11 (2009):3115-3123,
https://doi.org/10.1016/j.electacta.2008.11.068 . .