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Temperature Dependence of the Oxygen Reduction Kinetics on RuxSey/C Catalysts

✍ Scribed by D. Leveratto; A. Racz; E. R. Savinova; U. Stimming

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
252 KB
Volume
6
Category
Article
ISSN
1615-6846

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✦ Synopsis

Abstract

The temperature dependence of the oxygen reduction kinetics on carbon‐supported Ru~x~Se~y~ catalysts is studied using a rotating disc electrode in 0.5 M H~2~SO~4~ in the temperature interval from 25 °C to 65 °C. When the absolute value of the overpotential is below ca. 0.65 V, the reaction is limited by a one‐electron charge transfer step, where the transfer coefficient is independent of the temperature and equal to 0.44. The apparent activation enthalpy at zero overpotential is 0.49 eV and the pre‐exponential factor is independent of the temperature.

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Yan Sess, H . C . , "-ldsorption of Gases on Solids;, Review of the Role of Tl~rrn~odyiiamics." Z d . Etigr. F u d m , 8, 464 (1969).