The kinetics and mechanism of O2 reduction on an Ru electrode in acid electrolytes have been measured by using a disc—ring method. The reaction proceeds through a “parallel” mechanism with the exchange of approximately four electrons. It shows a pronounced dependence on the oxidation state of the Ru surface. A catalytic decomposition of H2O2 does not occur on the surface obtained at potentials E > 0.0 V. Tafel slopes, some rate constants and reaction orders for O2 and H2O2 reduction have been determined. Calculated rate constant for a direct reduction of O2 (k1) is higher than k2, the reduction with the H2O2 intermediate. The experimental value of k3, the H2O2 reduction, is lower than k1 and k2 at E > 0.05 V. The Tafel slope for O2 reduction with the value higher than 120 mV has been obtained.
TY - JOUR
AU - Anastasijević, Nikola A.
AU - Dimitrijević, Z. M.
AU - Adžić, Radoslav R.
PY - 1986
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4177
AB - The kinetics and mechanism of O2 reduction on an Ru electrode in acid electrolytes have been measured by using a disc—ring method. The reaction proceeds through a “parallel” mechanism with the exchange of approximately four electrons. It shows a pronounced dependence on the oxidation state of the Ru surface. A catalytic decomposition of H2O2 does not occur on the surface obtained at potentials E > 0.0 V. Tafel slopes, some rate constants and reaction orders for O2 and H2O2 reduction have been determined. Calculated rate constant for a direct reduction of O2 (k1) is higher than k2, the reduction with the H2O2 intermediate. The experimental value of k3, the H2O2 reduction, is lower than k1 and k2 at E > 0.05 V. The Tafel slope for O2 reduction with the value higher than 120 mV has been obtained.
PB - Elsevier
T2 - Electrochimica Acta
T1 - Oxygen reduction on a ruthenium electrode in acid electrolytes
VL - 39
IS - 9
SP - 1125
EP - 1130
DO - 10.1016/0013-4686(86)80124-4
ER -
@article{
author = "Anastasijević, Nikola A. and Dimitrijević, Z. M. and Adžić, Radoslav R.",
year = "1986",
url = "https://cer.ihtm.bg.ac.rs/handle/123456789/4177",
abstract = "The kinetics and mechanism of O2 reduction on an Ru electrode in acid electrolytes have been measured by using a disc—ring method. The reaction proceeds through a “parallel” mechanism with the exchange of approximately four electrons. It shows a pronounced dependence on the oxidation state of the Ru surface. A catalytic decomposition of H2O2 does not occur on the surface obtained at potentials E > 0.0 V. Tafel slopes, some rate constants and reaction orders for O2 and H2O2 reduction have been determined. Calculated rate constant for a direct reduction of O2 (k1) is higher than k2, the reduction with the H2O2 intermediate. The experimental value of k3, the H2O2 reduction, is lower than k1 and k2 at E > 0.05 V. The Tafel slope for O2 reduction with the value higher than 120 mV has been obtained.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "Oxygen reduction on a ruthenium electrode in acid electrolytes",
volume = "39",
number = "9",
pages = "1125-1130",
doi = "10.1016/0013-4686(86)80124-4"
}
Anastasijević NA, Dimitrijević ZM, Adžić RR. Oxygen reduction on a ruthenium electrode in acid electrolytes. Electrochimica Acta. 1986;39(9):1125-1130
Anastasijević, N. A., Dimitrijević, Z. M.,& Adžić, R. R. (1986). Oxygen reduction on a ruthenium electrode in acid electrolytes.
Electrochimica ActaElsevier., 39(9), 1125-1130.
https://doi.org/10.1016/0013-4686(86)80124-4
Anastasijević Nikola A., Dimitrijević Z. M., Adžić Radoslav R., "Oxygen reduction on a ruthenium electrode in acid electrolytes" 39, no. 9 (1986):1125-1130,
https://doi.org/10.1016/0013-4686(86)80124-4 .
