The kinetics of oxygen reduction were studied on iron in borate and bicarbonate buffered solutions, pH 9.8, using the rotating disk-ring method. Under these conditions O2 reduction occurs both on the oxidized surface and on the oxide-free one, depending on potential. On the oxidized surface the series mechanism was found to be operative. On the oxide-free surface the four-electron reduction was observed, but, due to the very small rate of H2O2 formation with respect to the total reduction current, a reliable distinction between the parallel and series mechanism could not be made. All the rate constants of the O2 and H2O2 reactions on the Fe surface were determined. No catalytic decomposition of H2O2 was found. The kinetics of the O2 reduction reaction is slower on more oxidized surfaces.
Source:
Journal of Electroanalytical Chemistry, 1989, 265, 1-2, 179-193
Publisher:
Elsevier Science Sa, Lausanne
Funding / projects:
National ScienceF oundation (U.S.A.), contract No. JFP 522/NSF, and to the ResearchF und of the S.R. Serbia for financial support.
TY - JOUR
AU - Zečević, S.K.
AU - Dražić, Dragutin M.
AU - Gojković, Snežana
PY - 1989
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/22
AB - The kinetics of oxygen reduction were studied on iron in borate and bicarbonate buffered solutions, pH 9.8, using the rotating disk-ring method. Under these conditions O2 reduction occurs both on the oxidized surface and on the oxide-free one, depending on potential. On the oxidized surface the series mechanism was found to be operative. On the oxide-free surface the four-electron reduction was observed, but, due to the very small rate of H2O2 formation with respect to the total reduction current, a reliable distinction between the parallel and series mechanism could not be made. All the rate constants of the O2 and H2O2 reactions on the Fe surface were determined. No catalytic decomposition of H2O2 was found. The kinetics of the O2 reduction reaction is slower on more oxidized surfaces.
PB - Elsevier Science Sa, Lausanne
T2 - Journal of Electroanalytical Chemistry
T1 - Oxygen reduction on iron. Part III. An analysis of the rotating disk-ring electrode measurements in near neutral solutions
EP - 193
IS - 1-2
SP - 179
VL - 265
DO - 10.1016/0022-0728(89)80188-3
ER -
@article{
author = "Zečević, S.K. and Dražić, Dragutin M. and Gojković, Snežana",
year = "1989",
abstract = "The kinetics of oxygen reduction were studied on iron in borate and bicarbonate buffered solutions, pH 9.8, using the rotating disk-ring method. Under these conditions O2 reduction occurs both on the oxidized surface and on the oxide-free one, depending on potential. On the oxidized surface the series mechanism was found to be operative. On the oxide-free surface the four-electron reduction was observed, but, due to the very small rate of H2O2 formation with respect to the total reduction current, a reliable distinction between the parallel and series mechanism could not be made. All the rate constants of the O2 and H2O2 reactions on the Fe surface were determined. No catalytic decomposition of H2O2 was found. The kinetics of the O2 reduction reaction is slower on more oxidized surfaces.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Oxygen reduction on iron. Part III. An analysis of the rotating disk-ring electrode measurements in near neutral solutions",
pages = "193-179",
number = "1-2",
volume = "265",
doi = "10.1016/0022-0728(89)80188-3"
}
Zečević, S.K., Dražić, D. M.,& Gojković, S.. (1989). Oxygen reduction on iron. Part III. An analysis of the rotating disk-ring electrode measurements in near neutral solutions. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 265(1-2), 179-193.
https://doi.org/10.1016/0022-0728(89)80188-3
Zečević S, Dražić DM, Gojković S. Oxygen reduction on iron. Part III. An analysis of the rotating disk-ring electrode measurements in near neutral solutions. in Journal of Electroanalytical Chemistry. 1989;265(1-2):179-193.
doi:10.1016/0022-0728(89)80188-3 .
Zečević, S.K., Dražić, Dragutin M., Gojković, Snežana, "Oxygen reduction on iron. Part III. An analysis of the rotating disk-ring electrode measurements in near neutral solutions" in Journal of Electroanalytical Chemistry, 265, no. 1-2 (1989):179-193,
https://doi.org/10.1016/0022-0728(89)80188-3 . .
