Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (10): 1687-1694.DOI: 10.1016/S1872-2067(14)60104-2

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Pt/MoO3-WO3/CNTs catalyst with excellent performance for methanol electrooxidation

Hongjuan Wang, Xiaohui Wang, Jiadao Zheng, Feng Peng, Hao Yu   

  1. The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy Technology of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2014-03-20 Revised:2014-04-04 Online:2014-09-28 Published:2014-09-30
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21106049, 21133010) and the Fundamental Research Funds for the Central Universities (2012ZM0033, 2014ZZ0049 ).

Abstract:

A composite Pt-based catalyst was prepared by loading MoO3 and WO3 nanoparticles onto carbon nanotubes (Pt/MoO3-WO3/CNTs). There was a uniform nanoparticle distribution with small particle sizes. This was achieved through an in situ self-assembly method using poly(diallyldimethylammo- nium chloride) as a linker and through subsequent immobilization of the Pt using ethylene glycol as a reducing agent. The total amount of oxide in the CNTs was 10 wt%, and when the molar ratio of MoO3 to WO3 was 1:0.5, Pt/MoO3-WO3/CNTs showed the highest activity for the electrocatalytic oxidation of methanol with forward peak current of 835 A/gPt. Because MoO3 and WO3 improve the electrocatalytic activity for methanol, CO oxidation ability, and the durability of the catalyst, the Pt/MoO3-WO3/CNTs catalyst exhibited excellent performance for the electrocatalytic oxidation of methanol.

Key words: Direct methanol fuel cell, Anode catalyst, Pt/MoO3-WO3/CNTs catalyst, Methanol electrooxidation, Carbon monoxide oxidation