A rotating Pt3Co, thermally prepared alloy disc is used to study electrochemical oxygen reduction in alkaline solutions of different pH. In all solutions two Tafel regions are found: at low current densities partial derivativeE/partial derivativelog j = -2.3RT/F and at high current densities partial derivativeE/log j = -2.3 x 2RT/F. The reaction order with respect to OH- is confirmed to be -1/2 and 0 for low and high current density regions, respectively. The coverage, theta, with oxygen intermediates, determined by a programmed potentiodynamic method, is found to be a function of potential and pH. In all solutions, substantial coverages are observed only at potentials in the low current density region. It is found that the fractional reaction order at low current densities is related through the adsorption of oxygen species under Temkin conditions and the dependence of activation energy on theta and pH.
TY - JOUR
AU - Obradović, Maja
AU - Grgur, Branimir
AU - Vračar, Ljiljana M.
PY - 2003
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/516
AB - A rotating Pt3Co, thermally prepared alloy disc is used to study electrochemical oxygen reduction in alkaline solutions of different pH. In all solutions two Tafel regions are found: at low current densities partial derivativeE/partial derivativelog j = -2.3RT/F and at high current densities partial derivativeE/log j = -2.3 x 2RT/F. The reaction order with respect to OH- is confirmed to be -1/2 and 0 for low and high current density regions, respectively. The coverage, theta, with oxygen intermediates, determined by a programmed potentiodynamic method, is found to be a function of potential and pH. In all solutions, substantial coverages are observed only at potentials in the low current density region. It is found that the fractional reaction order at low current densities is related through the adsorption of oxygen species under Temkin conditions and the dependence of activation energy on theta and pH.
PB - Elsevier Science Sa, Lausanne
T2 - Journal of Electroanalytical Chemistry
T1 - Adsorption of oxygen containing species and their effect on oxygen reduction on Pt3Co electrode
EP - 78
SP - 69
VL - 548
DO - 10.1016/S0022-0728(03)00223-7
ER -
@article{
author = "Obradović, Maja and Grgur, Branimir and Vračar, Ljiljana M.",
year = "2003",
abstract = "A rotating Pt3Co, thermally prepared alloy disc is used to study electrochemical oxygen reduction in alkaline solutions of different pH. In all solutions two Tafel regions are found: at low current densities partial derivativeE/partial derivativelog j = -2.3RT/F and at high current densities partial derivativeE/log j = -2.3 x 2RT/F. The reaction order with respect to OH- is confirmed to be -1/2 and 0 for low and high current density regions, respectively. The coverage, theta, with oxygen intermediates, determined by a programmed potentiodynamic method, is found to be a function of potential and pH. In all solutions, substantial coverages are observed only at potentials in the low current density region. It is found that the fractional reaction order at low current densities is related through the adsorption of oxygen species under Temkin conditions and the dependence of activation energy on theta and pH.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Adsorption of oxygen containing species and their effect on oxygen reduction on Pt3Co electrode",
pages = "78-69",
volume = "548",
doi = "10.1016/S0022-0728(03)00223-7"
}
Obradović, M., Grgur, B.,& Vračar, L. M.. (2003). Adsorption of oxygen containing species and their effect on oxygen reduction on Pt3Co electrode. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 548, 69-78.
https://doi.org/10.1016/S0022-0728(03)00223-7
Obradović M, Grgur B, Vračar LM. Adsorption of oxygen containing species and their effect on oxygen reduction on Pt3Co electrode. in Journal of Electroanalytical Chemistry. 2003;548:69-78.
doi:10.1016/S0022-0728(03)00223-7 .
Obradović, Maja, Grgur, Branimir, Vračar, Ljiljana M., "Adsorption of oxygen containing species and their effect on oxygen reduction on Pt3Co electrode" in Journal of Electroanalytical Chemistry, 548 (2003):69-78,
https://doi.org/10.1016/S0022-0728(03)00223-7 . .
