Electroxidation of H

A. Pozio, L. Giorgi, E. Antolini, E. Passalacqua

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Abstract

Pt/C, Pt-Ru/C and Pt-Mo/C electrocatalysts are used for hydrogen oxidation in polymer electrolyte fuel cells (PEFCs). In this paper, we report a semi-empirical equation that fits experimental electrode potential versus current density data for gas diffusion anodes using these electrocatalysts. The physico-chemical interpretation of all parameters used in the equation is also given. The presence of a strong kinetic limitation on Pt-M/C (M = Ru or Mo) electrodes is demonstrated. A Heyrowsky-Volmer mechanism for the hydrogen oxidation reaction is proposed on Pt-Mo/C and Pt-Ru/C. Accurate analysis of the cell voltage versus current density plots of polymer electrolyte fuel cells with Pt-Mo/C anodes show that it is difficult to evaluate the best Pt/Mo atomic ratio from full-cell measurements, while half-cell data are more useful for kinetic studies.
Original languageEnglish
Pages (from-to)555 - 561
Number of pages7
JournalElectrochimica Acta
Volume46
Issue number4
DOIs
Publication statusPublished - 1 Dec 2000

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Pozio, A., Giorgi, L., Antolini, E., & Passalacqua, E. (2000). Electroxidation of H. Electrochimica Acta, 46(4), 555 - 561. https://doi.org/10.1016/S0013-4686(00)00625-3