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Oxygen Reduction on a Ruthenium Electrode in Acid Electrolytes by N.A. Anastasijević; Z.M. Dimitrijević; R.R. Adžić is a Engineering article available to read on EtoBox.

What is Oxygen Reduction on a Ruthenium Electrode in Acid Electrolytes about?

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 H,OZ does not occur on the surface obtained at potentials E > 0.0 V. Tafel slopes, some rate constants and reaction orders for 02 and Hz02 reduction have been determined. Calculated rate constant for a direct reduction of 02 (k,) is higher than k2, the reduction with the HZOZ intermediate. The experimental value ofk3, the H202 reduction, is lower thank, and k2 at E r 0.05 V. The Tafel slope for O2 reduction with the value higher than 120 mV has been obtained.

Who reads Oxygen Reduction on a Ruthenium Electrode in Acid Electrolytes?

Author

N.A. Anastasijević; Z.M. Dimitrijević; R.R. Adžić

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0013-4686)

Published

1986

Language

EN

Field

Engineering (Physical Sciences)