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Oxygen reduction on a ruthenium electrode in acid electrolytes

Authorized Users Only
1986
Authors
Anastasijević, Nikola A.
Dimitrijević, Z. M.
Adžić, Radoslav R.
Article (Published version)
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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.
Keywords:
Oxygen reduction / Electrochemistry / Ru electrode / Kinetics
Source:
Electrochimica Acta, 1986, 39, 9, 1125-1130
Publisher:
  • Elsevier
Funding / projects:
  • Department of Energy, Washington, U.S.A., Contract, Energy 427

DOI: 10.1016/0013-4686(86)80124-4

ISSN: 0013-4686

Scopus: 2-s2.0-0000657429
[ Google Scholar ]
72
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/4177
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
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",
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, N. A., Dimitrijević, Z. M.,& Adžić, R. R.. (1986). Oxygen reduction on a ruthenium electrode in acid electrolytes. in Electrochimica Acta
Elsevier., 39(9), 1125-1130.
https://doi.org/10.1016/0013-4686(86)80124-4
Anastasijević NA, Dimitrijević ZM, Adžić RR. Oxygen reduction on a ruthenium electrode in acid electrolytes. in Electrochimica Acta. 1986;39(9):1125-1130.
doi: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" in Electrochimica Acta, 39, no. 9 (1986):1125-1130,
https://doi.org/10.1016/0013-4686(86)80124-4 . .

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