TY  - JOUR
AU  - Obradović, Maja
AU  - Grgur, Branimir N.
AU  - Gojković, Snežana Lj.
AU  - Vračar, Ljubomir
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4262
AB  - Polycrystalline Pt electrode was modified by underpotential deposition (upd) of nickel. The modification was performed by potential cycling in phosphate buffer pH7. 0 containing NiSO 4 , in which hydrogen and nickel upd processes were well separated. The maximum Ni upd coverage was found to be 0.3. Oxygen reduction was studied at bare and nickel upd-modified Pt. It was found that the reaction rate increased with increasing Ni upd coverage. At θ(Ni)=0.3, the current density was a factor of 2 higher compared to bare Pt (at the potential of 0.85V). The capacitance of the electrode interface was determined in potential-relaxation experiments following interruption of the polarization current. It was found that the pseudocapacitance owing to a coverage by the adsorbed reaction intermediates was higher on the Ni-modified Pt surface than on bare Pt, which resulted in higher reaction rate. The influence of Ni adatoms on the surface coverage by the reaction intermediates was attributed to the inhibition of OH adsorption on Pt by OH ligands attached on neighboring Ni atoms.
PB  - Springer Nature
T2  - Journal of Solid State Electrochemistry
T1  - Enhancement of the electrochemical reduction of oxygen at platinum by nickel underpotential deposition
VL  - 11
IS  - 1
SP  - 77
EP  - 83
DO  - 10.1007/s10008-005-0072-0
ER  - 

@article{
author = "Obradović, Maja and Grgur, Branimir N. and Gojković, Snežana Lj. and Vračar, Ljubomir",
year = "2006",
abstract = "Polycrystalline Pt electrode was modified by underpotential deposition (upd) of nickel. The modification was performed by potential cycling in phosphate buffer pH7. 0 containing NiSO 4 , in which hydrogen and nickel upd processes were well separated. The maximum Ni upd coverage was found to be 0.3. Oxygen reduction was studied at bare and nickel upd-modified Pt. It was found that the reaction rate increased with increasing Ni upd coverage. At θ(Ni)=0.3, the current density was a factor of 2 higher compared to bare Pt (at the potential of 0.85V). The capacitance of the electrode interface was determined in potential-relaxation experiments following interruption of the polarization current. It was found that the pseudocapacitance owing to a coverage by the adsorbed reaction intermediates was higher on the Ni-modified Pt surface than on bare Pt, which resulted in higher reaction rate. The influence of Ni adatoms on the surface coverage by the reaction intermediates was attributed to the inhibition of OH adsorption on Pt by OH ligands attached on neighboring Ni atoms.",
publisher = "Springer Nature",
journal = "Journal of Solid State Electrochemistry",
title = "Enhancement of the electrochemical reduction of oxygen at platinum by nickel underpotential deposition",
volume = "11",
number = "1",
pages = "77-83",
doi = "10.1007/s10008-005-0072-0"
}

Obradović, M., Grgur, B. N., Gojković, S. Lj.,& Vračar, L.. (2006). Enhancement of the electrochemical reduction of oxygen at platinum by nickel underpotential deposition. in Journal of Solid State Electrochemistry
Springer Nature., 11(1), 77-83.
https://doi.org/10.1007/s10008-005-0072-0

Obradović M, Grgur BN, Gojković SL, Vračar L. Enhancement of the electrochemical reduction of oxygen at platinum by nickel underpotential deposition. in Journal of Solid State Electrochemistry. 2006;11(1):77-83.
doi:10.1007/s10008-005-0072-0 .

Obradović, Maja, Grgur, Branimir N., Gojković, Snežana Lj., Vračar, Ljubomir, "Enhancement of the electrochemical reduction of oxygen at platinum by nickel underpotential deposition" in Journal of Solid State Electrochemistry, 11, no. 1 (2006):77-83,
https://doi.org/10.1007/s10008-005-0072-0 . .