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Degradation of the Pt-MoO x composite catalyst in methanol solutions

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Abstract

Pt-MoO x deposits synthesized by an electrochemical method are shown to be instable in methanol solutions at potentials ≥0.3 V. It is assumed that molybdenum oxides in the deposit composition react with methanol. The reduction of molybdenum compounds with methanol to form soluble Mo(+3) complexes in the presence of platinum is confirmed by spectrophotometric data. The MoO x reaction with methanol leads to the removal of molybdenum compounds from the electrode surface, which is accompanied by the loss of its catalytic activity in the methanol oxidation reaction.

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Authors and Affiliations

  1. Mendeleev University of Chemical Engineering, Miusskaya pl. 6, Moscow A-47, 125047, Russia

    V. V. Kuznetsov & A. A. Kalinkina

  2. Faculty of Chemistry, Moscow State University, Vorob’evy Gory, GSP-3, Moscow, 119899, Russia

    Yu. M. Maksimov & B. I. Podlovchenko

Authors
  1. V. V. Kuznetsov
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  2. A. A. Kalinkina
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  3. Yu. M. Maksimov
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  4. B. I. Podlovchenko
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Correspondence to V. V. Kuznetsov.

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Original Russian Text © V.V. Kuznetsov, A.A. Kalinkina, Yu.M. Maksimov, B.I. Podlovchenko, 2009, published in Elektrokhimiya, 2009, Vol. 45, No. 10, pp. 1307–1310.

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Kuznetsov, V.V., Kalinkina, A.A., Maksimov, Y.M. et al. Degradation of the Pt-MoO x composite catalyst in methanol solutions. Russ J Electrochem 45, 1211–1214 (2009). https://doi.org/10.1134/S1023193509100176

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  • DOI: https://doi.org/10.1134/S1023193509100176

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