Electrochemical oxidation of CO over tin oxide supported platinum catalysts
2005; Elsevier BV; Volume: 155; Issue: 2 Linguagem: Inglês
10.1016/j.jpowsour.2005.05.003
ISSN1873-2755
AutoresToshiaki Matsui, Katsuhiko Fujiwara, Takeoh Okanishi, Ryuji Kikuchi, Tatsuya Takeguchi, Koichi Eguchi,
Tópico(s)Catalysis and Oxidation Reactions
ResumoTin oxide supported platinum catalysts (Pt/SnOx) for use in polymer electrolyte fuel cells were prepared, and their electrochemical oxidation of CO was investigated. From the XPS measurements of Pt/SnOx catalysts, it was found that the binding energy of Pt showed no change compared to bulk Pt, regardless of tin oxide addition. In accordance with this result, CO-stripping voltammograms for Pt/SnOx catalysts revealed that the peak potential for the pre-adsorbed CO oxidation was almost the same value of Pt/C catalyst. However, the onset potential of CO oxidation shifted negatively compared to PtRu/C catalyst, indicating an enhancement of CO tolerance of Pt/SnOx catalysts.
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