Phosphomolybdic acid modified PtRu nanocatalysts for methanol electro-oxidation

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• 作者：Weimin Chen (1)
  Xufang Wei (1)
  Yu Zhang (1)
  
• 关键词：Direct methanol fuel cells ; Electrocatalyst ; Phosphomolybdic acid ; Modification
• 刊名：Journal of Applied Electrochemistry
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：43
• 期：6
• 页码：575-582
• 全文大小：585KB
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• 作者单位：Weimin Chen (1)
  Xufang Wei (1)
  Yu Zhang (1)
  
  1. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang, 110159, China
  
• ISSN：1572-8838

文摘

Phosphomolybdic acid (H3PMo12O40, PMo12) was employed to modify PtRu nanocatalysts for methanol electro-oxidation. The results show that the performance of PtRu catalysts was improved by the formation of the negatively charged self-assembled PMo12 monolayer on the catalyst surface. Electrochemical measurements indicate that the PMo12-modified PtRu catalyst has a higher catalytic activity and a better poison tolerance than the unmodified one. It is also found that the sequence in which PtRu and PMo12 were deposited onto the carbon support during the preparation process has a major influence on the performance of PMo12-modified PtRu nanocatalysts. X-ray photoelectron spectra results show that the self-assembled PMo12 layer inhibits the formation of metal oxides/hydroxides on the surface of PtRu nanoparticles to some extent.