CO-Tolerant PtMo/C Fuel Cell Catalyst for H-2 Oxidation
- Title
- CO-Tolerant PtMo/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, v. 32, NO. 10, Page. 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 electro-oxidation 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/JAKO201132833920685.pagehttps://repository.hanyang.ac.kr/handle/20.500.11754/181783
- ISSN
- 0253-2964;1229-5949
- DOI
- 10.5012/bkcs.2011.32.10.3660
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > CHEMICAL AND MOLECULAR ENGINEERING(화학분자공학과) > Articles
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