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Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes

Author

Listed:
  • Liang Li

    (Department of Chemical and Biological Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
    Current address: Northeastern University, Boston, MA 02148, USA.)

  • Yangchuan Xing

    (Department of Chemical and Biological Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA)

Abstract

Carbon nanotubes (CNTs) have been investigated in recent years as a catalyst support for proton exchange membrane fuel cells. Improved catalyst activities were observed and attributed to metal-support interactions. We report a study on the kinetics of methanol electro-oxidation on CNT supported Pt-Ru alloy nanoparticles. Alloy catalysts with different compositions, Pt 53 Ru 47 /CNT, Pt 69 Ru 31 /CNT and Pt 77 Ru 23 /CNT, were prepared and investigated in detail. Experiments were conducted at various temperatures, electrode potentials, and methanol concentrations. It was found that the reaction order of methanol electro-oxidation on the PtRu/CNT catalysts was consistent with what has been reported for PtRu alloys with a value of 0.5 in methanol concentrations. However, the electro-oxidation reaction on the PtRu/CNT catalysts displayed much lower activation energies than that on the Pt-Ru alloy catalysts unsupported or supported on carbon black (PtRu/CB). This study provides an overall kinetic evaluation of the PtRu/CNT catalysts and further demonstrates the beneficial role of CNTs.

Suggested Citation

  • Liang Li & Yangchuan Xing, 2009. "Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes," Energies, MDPI, vol. 2(3), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:2:y:2009:i:3:p:789-804:d:5772
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