Journal of Applied Electrochemistry

, Volume 18, Issue 5, pp 763–767 | Cite as

Oxygen reduction on platinum in mixtures of phosphoric and trifluoromethane sulphonic acids

  • M. A. Enayetullah
  • E. J. M. O'Sullivan
  • E. B. Yeager
Papers
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Abstract

A rotating disk electrode study of O2 reduction on platinum has been carried out in mixtures of concentrated H3PO4 and CF3SO3H at room temperature. The diffusion limiting current was found to increase with increasing amounts of CF3SO3H added to the H3PO4. The apparent first-order rate constant defined in terms of O2 concentration (M) is lower in the mixed acids than in H3PO4 (86% by weight), but the concentration of O2 increases by a much larger factor, with the result that the kinetics are faster in the mixed acids.

Keywords

Oxygen Physical Chemistry Platinum H3PO4 Sulphonic Acid 
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Copyright information

© Chapman and Hall Ltd 1988

Authors and Affiliations

  • M. A. Enayetullah
    • 1
  • E. J. M. O'Sullivan
    • 1
  • E. B. Yeager
    • 1
  1. 1.Case Center for Electrochemical SciencesCase Western Reserve UniversityClevelandUSA

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