Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (04): 719-723.doi: 10.3866/PKU.WHXB20090425

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Electrodeposition Preparation and Activity of CO-Resistant Catalyst Pt-HxWO3 for Methanol Oxidation

 YANG Hong-Yan, GUO Pan-Pan, LI Wei-Shan   

  1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China; Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation in Guangdong Universities, Guangzhou 510006, P. R. China
  • Received:2008-10-20 Revised:2009-01-19 Published:2009-03-31
  • Contact: LI Wei-Shan E-mail:liwsh@scnu.edu.cn

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Abstract:

Platinum-hydrogen tungsten bronze (Pt-HxWO3) was prepared on a glassy carbon electrode by cyclic
voltammetry and its composition, morphology, structure, and activity towards methanol oxidation were characterized by scanning electron microscope (SEM), Raman spectrum, and cyclic voltammetry. Results show that Pt-HxWO3 has better activity toward methanol oxidation than pure platinum(Pt) prepared under the same conditions. When the atomic ratio of Pt toWin the solution for the Pt-HxWO3 preparation is 1:8, the atomic ratio of Pt toWin the prepared Pt-HxWO3 is 4:1. This catalyst has the best activity for methanol oxidation. The peak current for methanol oxidation on this catalyst is 1.7 times that on Pt. The better catalytic activity of Pt-HxWO3 results from its better resistance to toxic CO than Pt because the CO oxidation on Pt-HxWO3 is 50 mV more negative than the case on Pt.

Key words: Electrodeposition, Platinum, Hydrogen tungsten bronze, Methanol oxidation, CO