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题名: Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation
作者: Shan, WJ;  Luo, MF;  Ying, PL;  Shen, WJ;  Li, C
关键词: nickel ;  solid solution ;  methane combustion ;  oxygen vacancy
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2003-06-25
DOI: 10.1016/S0926-860X(02)00659-2
卷: 246, 期:1, 页:1-9
收录类别: SCI
文章类型: Article
部门归属: 501
项目归属: 501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Ce1-XNiXO2 oxides with X varying from 0.05 to 0.5 were prepared by different methods and characterized by XRD and TPR techniques. Ce(0.7)Mi(0.3)O(2) sample prepared by sol-gel method shows the highest reducibility and the highest catalytic activity for methane combustion. Three kinds of Ni phases co-exist in the Ce1-XNiXO2 catalysts prepared by sol-gel method: (i) aggregated NiO on the support CeO2, (ii) highly dispersed NiO with strong interaction with CeO2 and (iii) Ni atoms incorporated into CeO2 lattice. The distribution of different Ni species strongly depends on the preparation methods. The highly dispersed NiO shows the highest activity for methane combustion. The NiO aggregated on the support CeO2 shows lower catalytic activity for methane combustion, while the least catalytic activity is found for the Ni species incorporated into CeO2. Any oxygen vacancy formed in CeO2 lattice due to the incorporating of Ni atoms adsorbs and activates the molecular oxygen to form active oxygen species. So the highest catalytic activity for methane combustion on Ce0.7Ni0.3O2 catalyst is attributed not only to the highly dispersed Ni species but also to the more active oxygen species formed. (C) 2002 Elsevier Science B.V. All rights reserved.
关键词[WOS]: OXYGEN-HYDROGEN SYSTEM ;  ELECTRON-MICROSCOPY ;  CARBON-MONOXIDE ;  METHANE ;  NICKEL ;  CERIA ;  COMBUSTION ;  STORAGE ;  SURFACE ;  XRD
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000183902500001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82855
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:
Shan, WJ,Luo, MF,Ying, PL,et al. Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation[J]. APPLIED CATALYSIS A-GENERAL,2003,246(1):1-9.
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