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The role of the WO x ad-component to Pt and PtRu catalysts in the electrochemical CH3OH oxidation reaction

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Abstract

High surface area carbon-supported platinum-based catalysts, Pt/C, PtWO x /C, PtRu/C and PtRuWO x /C, were prepared via a chemical reduction route using single metal precursor salts. The catalyst particles were found to be in the nanoscale range, and the addition of Ru clearly decreased the particle size. The Ru was found to be partially incorporated into the face centered cubic lattice of Pt and to form a single Ru catalyst component. X-ray diffraction and X-ray photon spectroscopy did not provide evidence for electronic interactions between WO x and Pt as well as WO x and Ru. However, the addition of tungsten to the PtRuWO x /C catalyst resulted in a high degree of catalyst particle agglomeration. Both Ru containing catalysts showed significantly higher activities for the CH3OH oxidation reaction in terms of Pt + Ru mass as well as electroactive Pt + Ru surface area than the Pt/C and PtWO x /C catalysts. The addition of tungsten appeared to mainly result in some ‘physical’ modification of the catalytically active Pt and Ru surface components such as differences in electroactive surface area rather than promotion of the CH3OH oxidation reaction via a true catalytic mechanism.

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Authors and Affiliations

  1. National Research Council Canada, Montreal Road, Ottawa, Ontario, K1A OR6, Canada

    L.X. Yang, C. Bock, B. MacDougall & J. Park

Authors
  1. L.X. Yang
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  2. C. Bock
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  3. B. MacDougall
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  4. J. Park
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Correspondence to C. Bock.

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Yang, L., Bock, C., MacDougall, B. et al. The role of the WO x ad-component to Pt and PtRu catalysts in the electrochemical CH3OH oxidation reaction. Journal of Applied Electrochemistry 34, 427–438 (2004). https://doi.org/10.1023/B:JACH.0000016628.81571.f4

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  • DOI: https://doi.org/10.1023/B:JACH.0000016628.81571.f4

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