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Journal of Applied Electrochemistry

, Volume 34, Issue 1, pp 61–66 | Cite as

Preparation of Pt–Ru bimetallic anodes by galvanostatic pulse electrodeposition: characterization and application to the direct methanol fuel cell

  • C. Coutanceau
  • A.F. Rakotondrainibé
  • A. Lima
  • E. Garnier
  • S. Pronier
  • J-M. Léger
  • C. Lamy
Article

Abstract

The electrodeposition of platinum and ruthenium was carried out on carbon electrodes to prepare methanol anodes with different Pt/Ru atomic ratios using a galvanostatic pulse technique. Characterizations by XRD, TEM, EDX and atomic absorption spectroscopy indicated that most of the electrocatalytic anodes consisted of 2 mg cm−2 of Pt–Ru alloy particles with the desired composition and with particle sizes ranging from 5 to 8 nm. Electrochemical tests in a single DMFC show that these electrodes are very active for methanol oxidation and that the best Pt/Ru atomic ratio in the temperature range used (50–110 °C) is 80:20. The influence of the relaxation time toff was also studied and it appeared that a low toff led to smaller particle sizes and higher performances in terms of current density and power density.

carbon electrode DMFC Electrodeposition galvanostatic pulses platinum–ruthenium catalysts 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • C. Coutanceau
    • 1
  • A.F. Rakotondrainibé
    • 1
  • A. Lima
    • 1
  • E. Garnier
    • 1
  • S. Pronier
    • 1
  • J-M. Léger
    • 1
  • C. Lamy
    • 1
  1. 1.Equipe ElectrocatalyseUMR CNRS 6503, Université de PoitiersPoitiersFrance

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