CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation

Title
CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation
Other Titles
C Fuel Cell Catalyst for H-2 Oxidation
Author
방진호
Keywords
Fuel cell; PtMo electrocatalyst; CO electro-oxidation; $H_2$ oxidation; X-ray absorption spectroscopy
Issue Date
2011-10
Publisher
대한화학회
Citation
Bulletin of the Korean Chemical Society 2011, 32(10),3660-3665
Abstract
CO-tolerant PtMo/C alloy electrocatalyst was prepared by a colloidal method, and its electrocatalytic activity toward CO oxidation was investigated. Electrochemical study revealed that the alloy catalyst significantly enhanced catalytic activity toward the electro-oxidation of CO compared to Pt/C counterpart. Cyclic voltammetry suggested that Mo plays an important role in promoting CO electro-oxidation by facilitating the formation of active oxygen species. The effect of Mo on the electronic structure of Pt was investigated using X-ray absorption spectroscopy to elucidate the synergetic effect of alloying. Our in-depth spectroscopic analysis revealed that CO is less strongly adsorbed on PtMo/C catalyst than on Pt/C catalyst due to the modulation of the electronic structure of Pt d-band. Our investigation shows that the enhanced CO electrooxidation in PtMo alloy electrocatalyst is originated from two factors; one comes from the facile formation of active oxygen species, and the other from the weak interaction between Pt and CO.
URI
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JCGMCS_2011_v32n10_3660
ISSN
0253-2964; 1229-5949
DOI
10.5012/bkcs.2011.32.10.3660
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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