A polyoxometalate-deposited Pt/CNT electrocatalyst via chemical synthesis for methanol electrooxidation

被引:87
作者
Seo, Min Ho [1 ]
Choi, Sung Mook [1 ]
Kim, Hyung Ju [1 ]
Kim, Jae Hong [1 ]
Cho, Beong Ki [1 ]
Kim, Won Bae [1 ]
机构
[1] GIST, Dept Mat Sci & Engn, Kwangju 500712, South Korea
关键词
polyoxometalate; platinum catalyst; carbon nanotubes; direct methanol fuel cell; enhanced activity; methanol oxidation;
D O I
10.1016/j.jpowsour.2007.12.107
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Polyoxometalate anion PMo12O403- (POM) is chemically impregnated into a Pt-supported carbon nanotubes (Pt/CNTs) catalyst that is prepared via a colloidal method. The POM-impregnated Pt/CNTs catalyst system (Pt/CNTs-POM) shows at least 50% higher catalytic mass activity with improved stability for the electrooxidation of methanol than Pt/CNTs or POM-impregnated Pt/C (Pt/C-POM) catalyst systems. The enhancement in electrochemical performance of the Pt/CNTs-POM catalyst system can be attributed to the combined beneficial effects of improved electrical conductivity due to the CNTs support, highly dispersed Pt nanoparticles on the CNTs, and increased oxidation power of the polyoxometalate that can assist oxidative removal of reaction intermediates adsorbed on the Pt catalyst surface. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:81 / 86
页数:6
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