TY  - JOUR
AU  - Golubović, Jelena
AU  - Rakočević, Lazar
AU  - Vasiljević-Radović, Dana
AU  - Štrbac, Svetlana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5489
AB  - PdPt bimetallic nanoparticles on carbon-based supports functioning as advanced electrode materials have attracted attention due to their low content of noble metals and high catalytic activity for fuel cell reactions. Glassy carbon (GC)-supported Pt and PdPt nanoparticles, as promising catalysts for the oxygen reduction reaction (ORR), were prepared by the electrochemical deposition of Pt and the subsequent spontaneous deposition of Pd. The obtained electrodes were examined using X-ray Photoelectron Spectroscopy (XPS), Atomic Force Microscopy (AFM), and electroanalytical techniques. An XPS analysis of the PdPt/GC with the highest ORR performance revealed that the stoichiometric ratio of Pd: Pt was 1:2, and that both Pt and Pd were partially oxidized. AFM images of PdPt2/GC showed the full coverage of GC with PdPt nanoparticles with sizes from 100–300 nm. The ORR activity of PdPt2/GC in an acid solution approached that of polycrystalline Pt (E1/2 = 0.825 V vs. RHE), while exceeding it in an alkaline solution (E1/2 = 0.841 V vs. RHE). The origin of the improved ORR on PdPt2/GC in an alkaline solution is ascribed to the presence of a higher amount of adsorbed OH species originating from both PtOH and PdOH that facilitated the 4e-reaction pathway.
PB  - Švajcarska : MDPI
T2  - Catalysis
T1  - Improved Oxygen Reduction on GC-Supported Large-Sized Pt Nanoparticles by the Addition of Pd
VL  - 12
IS  - 9
SP  - 968
DO  - 10.3390/catal12090968
ER  - 

@article{
author = "Golubović, Jelena and Rakočević, Lazar and Vasiljević-Radović, Dana and Štrbac, Svetlana",
year = "2022",
abstract = "PdPt bimetallic nanoparticles on carbon-based supports functioning as advanced electrode materials have attracted attention due to their low content of noble metals and high catalytic activity for fuel cell reactions. Glassy carbon (GC)-supported Pt and PdPt nanoparticles, as promising catalysts for the oxygen reduction reaction (ORR), were prepared by the electrochemical deposition of Pt and the subsequent spontaneous deposition of Pd. The obtained electrodes were examined using X-ray Photoelectron Spectroscopy (XPS), Atomic Force Microscopy (AFM), and electroanalytical techniques. An XPS analysis of the PdPt/GC with the highest ORR performance revealed that the stoichiometric ratio of Pd: Pt was 1:2, and that both Pt and Pd were partially oxidized. AFM images of PdPt2/GC showed the full coverage of GC with PdPt nanoparticles with sizes from 100–300 nm. The ORR activity of PdPt2/GC in an acid solution approached that of polycrystalline Pt (E1/2 = 0.825 V vs. RHE), while exceeding it in an alkaline solution (E1/2 = 0.841 V vs. RHE). The origin of the improved ORR on PdPt2/GC in an alkaline solution is ascribed to the presence of a higher amount of adsorbed OH species originating from both PtOH and PdOH that facilitated the 4e-reaction pathway.",
publisher = "Švajcarska : MDPI",
journal = "Catalysis",
title = "Improved Oxygen Reduction on GC-Supported Large-Sized Pt Nanoparticles by the Addition of Pd",
volume = "12",
number = "9",
pages = "968",
doi = "10.3390/catal12090968"
}

Golubović, J., Rakočević, L., Vasiljević-Radović, D.,& Štrbac, S.. (2022). Improved Oxygen Reduction on GC-Supported Large-Sized Pt Nanoparticles by the Addition of Pd. in Catalysis
Švajcarska : MDPI., 12(9), 968.
https://doi.org/10.3390/catal12090968

Golubović J, Rakočević L, Vasiljević-Radović D, Štrbac S. Improved Oxygen Reduction on GC-Supported Large-Sized Pt Nanoparticles by the Addition of Pd. in Catalysis. 2022;12(9):968.
doi:10.3390/catal12090968 .

Golubović, Jelena, Rakočević, Lazar, Vasiljević-Radović, Dana, Štrbac, Svetlana, "Improved Oxygen Reduction on GC-Supported Large-Sized Pt Nanoparticles by the Addition of Pd" in Catalysis, 12, no. 9 (2022):968,
https://doi.org/10.3390/catal12090968 . .

TY  - JOUR
AU  - Golubović, Jelena
AU  - Srejić, Irina
AU  - Štrbac, Svetlana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7472
AB  - PdAu/GC nanoparticles obtained by the electrochemical deposition of gold followed by the spontaneous palladium deposition show a remarkable catalytic activity for the oxygen reduction reaction (ORR) in perchloric acid solution. AFM images reveal the size, shape, and coverage of the GC electrode with Au and PdAu nanoislands. Au/GC electrode with the full GC coverage by the deposited gold islands and activated by potential cycling shows the highest ORR activity. The initial potential for ORR shifts positively for 200 mV compared to polycrystalline gold. With the addition of palladium, the activity for ORR enhances significantly. For the most active PdAu/GC electrode, the initial potential shifts positively for another 250 mV, which coincides with polycrystalline palladium.
PB  - Elsevier
T2  - International Journal of Electrochemical Science
T1  - Oxygen Reduction on Glassy Carbon-Supported PdAu Nanoparticles in Perchloric Acid Solution
VL  - 16
IS  - 8
SP  - 210818
DO  - 10.20964/2021.08.01
ER  - 

@article{
author = "Golubović, Jelena and Srejić, Irina and Štrbac, Svetlana",
year = "2021",
abstract = "PdAu/GC nanoparticles obtained by the electrochemical deposition of gold followed by the spontaneous palladium deposition show a remarkable catalytic activity for the oxygen reduction reaction (ORR) in perchloric acid solution. AFM images reveal the size, shape, and coverage of the GC electrode with Au and PdAu nanoislands. Au/GC electrode with the full GC coverage by the deposited gold islands and activated by potential cycling shows the highest ORR activity. The initial potential for ORR shifts positively for 200 mV compared to polycrystalline gold. With the addition of palladium, the activity for ORR enhances significantly. For the most active PdAu/GC electrode, the initial potential shifts positively for another 250 mV, which coincides with polycrystalline palladium.",
publisher = "Elsevier",
journal = "International Journal of Electrochemical Science",
title = "Oxygen Reduction on Glassy Carbon-Supported PdAu Nanoparticles in Perchloric Acid Solution",
volume = "16",
number = "8",
pages = "210818",
doi = "10.20964/2021.08.01"
}

Golubović, J., Srejić, I.,& Štrbac, S.. (2021). Oxygen Reduction on Glassy Carbon-Supported PdAu Nanoparticles in Perchloric Acid Solution. in International Journal of Electrochemical Science
Elsevier., 16(8), 210818.
https://doi.org/10.20964/2021.08.01

Golubović J, Srejić I, Štrbac S. Oxygen Reduction on Glassy Carbon-Supported PdAu Nanoparticles in Perchloric Acid Solution. in International Journal of Electrochemical Science. 2021;16(8):210818.
doi:10.20964/2021.08.01 .

Golubović, Jelena, Srejić, Irina, Štrbac, Svetlana, "Oxygen Reduction on Glassy Carbon-Supported PdAu Nanoparticles in Perchloric Acid Solution" in International Journal of Electrochemical Science, 16, no. 8 (2021):210818,
https://doi.org/10.20964/2021.08.01 . .

TY  - JOUR
AU  - Rakočević, Lazar
AU  - Srejić, Irina
AU  - Maksić, Aleksandar
AU  - Golubović, Jelena
AU  - Štrbac, Svetlana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4566
AB  - Hydrogen evolution reaction (HER) was investigated on reduced graphene oxide (rGO)-supported Au and PdAu nanoparticles in acid solution. The graphene spread over glassy carbon (rGO/GC) was used as a support for the spontaneous deposition of Au and Pd. The resulting Au/rGO and PdAu/rGO electrodes were characterized using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) techniques. Phase AFM images have shown that the edges of the rGO sheets were active sites for the deposition of both Au and Pd. XPS analysis revealed that the atomic percentages of both Au and PdAu nanoparticles were slightly higher than 1%. The activity of the PdAu/rGO electrode for the HER was remarkably high, with the overpotential close to zero. HER activity was stable over a 3 h testing time, with a low Tafel slope of approx. −46 mV/dec achieved after prolonged hydrogen evolution at a constant potential.
PB  - MDPI
T2  - Catalysis
T1  - Hydrogen evolution on reduced graphene oxide-supported PdAu nanoparticles
VL  - 11
IS  - 4
SP  - 481
DO  - 10.3390/catal11040481
ER  - 

@article{
author = "Rakočević, Lazar and Srejić, Irina and Maksić, Aleksandar and Golubović, Jelena and Štrbac, Svetlana",
year = "2021",
abstract = "Hydrogen evolution reaction (HER) was investigated on reduced graphene oxide (rGO)-supported Au and PdAu nanoparticles in acid solution. The graphene spread over glassy carbon (rGO/GC) was used as a support for the spontaneous deposition of Au and Pd. The resulting Au/rGO and PdAu/rGO electrodes were characterized using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) techniques. Phase AFM images have shown that the edges of the rGO sheets were active sites for the deposition of both Au and Pd. XPS analysis revealed that the atomic percentages of both Au and PdAu nanoparticles were slightly higher than 1%. The activity of the PdAu/rGO electrode for the HER was remarkably high, with the overpotential close to zero. HER activity was stable over a 3 h testing time, with a low Tafel slope of approx. −46 mV/dec achieved after prolonged hydrogen evolution at a constant potential.",
publisher = "MDPI",
journal = "Catalysis",
title = "Hydrogen evolution on reduced graphene oxide-supported PdAu nanoparticles",
volume = "11",
number = "4",
pages = "481",
doi = "10.3390/catal11040481"
}

Rakočević, L., Srejić, I., Maksić, A., Golubović, J.,& Štrbac, S.. (2021). Hydrogen evolution on reduced graphene oxide-supported PdAu nanoparticles. in Catalysis
MDPI., 11(4), 481.
https://doi.org/10.3390/catal11040481

Rakočević L, Srejić I, Maksić A, Golubović J, Štrbac S. Hydrogen evolution on reduced graphene oxide-supported PdAu nanoparticles. in Catalysis. 2021;11(4):481.
doi:10.3390/catal11040481 .

Rakočević, Lazar, Srejić, Irina, Maksić, Aleksandar, Golubović, Jelena, Štrbac, Svetlana, "Hydrogen evolution on reduced graphene oxide-supported PdAu nanoparticles" in Catalysis, 11, no. 4 (2021):481,
https://doi.org/10.3390/catal11040481 . .