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题名: IrFeOx/SiO2-A highly active catalyst for preferential CO oxidation in H-2
作者: Zhang, Wansheng1;  Huang, Yanqiang1;  Wang, Junhu1;  Liu, Kuo1;  Wang, Xiaodong1;  Wang, Aiqin1;  Zhang, Tao1
关键词: Iridium ;  Silica supported IrFe catalyst ;  PROX ;  Non-competitive adsorption
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2010-04-01
DOI: 10.1016/j.ijhydene.2009.07.016
卷: 35, 期:7, 页:3065-3071
收录类别: SCI ;  ISTP
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: A novel bifunctional catalyst IrFeOx/SiO2, which was very active and selective for preferential oxidation of CO under H-2-rich atmosphere, was developed in this study. XRD, H-2-TPR, and chemisorption were applied to characterize three kinds of IrFeOx/SiO2 catalysts prepared by different impregnation sequences. The results indicated that both FeOx and Jr species were highly dispersed on the SiO2 support; the reduction of Ir species in the Fe-promoted Ir/SiO2 catalyst became easier than those in the Ir/SiO2, together with the partial reduction of Fe2O3; the saturation uptake of O-2 adsorption was greatly enhanced. In-situ DRIFTS, XPS, and Mossbauer techniques were further applied to detect the structural information on the selected Ir-FeOx/SiO2 catalyst prepared by co-impregnation method. A non-competitive adsorption catalytic mechanism was proposed where CO adsorbed on It sites and O-2 adsorbed on FeOx sites; the reaction probably took place at the interface of Ir and FeOx or via a spill-over process. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: CARBON-SUPPORTED CATALYSTS ;  FUEL-CELL APPLICATIONS ;  H-2-RICH GAS STREAMS ;  SELECTIVE OXIDATION ;  METAL-CATALYSTS ;  MONOXIDE ;  FE ;  PROMOTION ;  PROX ;  H2O
语种: 英语
WOS记录号: WOS:000276692800090
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141956
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Wansheng,Huang, Yanqiang,Wang, Junhu,et al. IrFeOx/SiO2-A highly active catalyst for preferential CO oxidation in H-2[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(7):3065-3071.
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