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Journal of Applied Electrochemistry

, Volume 36, Issue 10, pp 1117–1125 | Cite as

Performance of ternary PtRuRh/C electrocatalyst with varying Pt:Ru:Rh ratio for methanol electro-oxidation

  • Tomoyuki Kawaguchi
  • Yasuhiro Rachi
  • Wataru Sugimoto
  • Yasushi Murakami
  • Yoshio Takasu
OriginalPaper

Abstract

Highly dispersed ternary PtRuRh/C anode catalysts for direct methanol fuel cells were prepared with various contents and their electro-catalytic activities towards methanol oxidation at 25 °C and 60 °C were examined to investigate the influence of the catalyst composition. Electrocatalysts were prepared by a co-impregnation method using ethanolic solutions of metal precursors and carbon black followed by pyrolysis under reducing conditions. X-ray diffraction analysis revealed that the fcc peaks shifted to higher diffraction angles with increasing Rh content, indicating the alloying of Rh into the fcc structure. In terms of the mass specific current density, the activity towards methanol oxidation differed significantly depending on the catalysts composition and cell temperature. The catalyst prepared at a ratio of Pt:Ru:Rh = 1:1:2 exhibited the highest activity at 60 °C of 155 A (g-Pt)−1 at 0.5 V vs. RHE.

Keywords

direct methanol fuel cell anode catalyst PtRuRh methanol electro-oxidation 

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Notes

Acknowledgements

This work was supported in part by the “Polymer Electrolyte Fuel Cell Program” from the New Energy and Industrial Technology Development Organization (NEDO) of Japan, in collaboration with Toray Industries, Inc., and a 21st Century COE Program from MEXT, Japan. The Pt(NH3)2(NO2)2 complex was a gift from Ishihuku Metal Industry Co., Ltd. We gratefully acknowledge their help.

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Tomoyuki Kawaguchi
    • 1
  • Yasuhiro Rachi
    • 1
  • Wataru Sugimoto
    • 1
  • Yasushi Murakami
    • 1
  • Yoshio Takasu
    • 1
  1. 1.Department of Fine Materials Engineering, Faculty of Textile Science and TechnologyShinshu UniversityUedaJapan

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