期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 638, 期 1, 页码 167-172出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2009.09.001
关键词
Alcohol electro-oxidation; Carbon monoxide tolerance; Heteropoly acids; Phosphomolybdic acid; Pt nanoparticles; Direct alcohol fuel cells
资金
- PRC [2009CB220105]
- National Natural Science Foundation of China [90410002]
A simple approach is reported for utilizing phosphomolybdic acid, H3PMo12O40, (HPMo) to enhance the electrocatalytic activity and carbon monoxide (CO) tolerance of platinum electrocatalysts supported on multi-walled carbon nanotubes (MWCNTs) in acidic medium. Pt/MWCNTs catalyst is prepared by the ethylene glycol reduction method, and then physically mixed with HPMo for electrochemical characterizations in terms of alcohol and CO electro-oxidation using cyclic voltammetry (CV), chronoamperometry and electrochemical impendence spectra (EIS). The results show that HPMo can efficiently enhance the electrocatalytic activity and CO-tolerance of Pt/MWCNTs catalyst. The effect of HPMo wt.% on the electrocatalytic activity towards methanol electro-oxidation of Pt/MWCNTs is also investigated by CV. The best results appear at the HPMo wt.% = 30%. We further investigated the reason of Pt/MWCNTs + HPMo composite catalyst with good stability. (c) 2009 Published by Elsevier B.V.
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