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Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation; Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation
Shan, WJ; Luo, MF; Ying, PL; Shen, WJ; Li, C
关键词Nickel Nickel Solid Solution Solid Solution Methane Combustion Methane Combustion Oxygen Vacancy Oxygen Vacancy
刊名APPLIED CATALYSIS A-GENERAL ; APPLIED CATALYSIS A-GENERAL
2003-06-25 ; 2003-06-25
DOI10.1016/S0926-860X(02)00659-2 ; 10.1016/S0926-860X(02)00659-2
246期:1页:1-9
收录类别SCI ; SCI
文章类型Article ; Article
部门归属501 ; 501
项目归属501 ; 501
产权排名1;1 ; 1;1
WOS标题词Science & Technology ; Science & Technology ; Physical Sciences ; Physical Sciences ; Life Sciences & Biomedicine ; Life Sciences & Biomedicine
类目[WOS]Chemistry, Physical ; Chemistry, Physical ; Environmental Sciences ; Environmental Sciences
研究领域[WOS]Chemistry ; Chemistry ; Environmental Sciences & Ecology ; Environmental Sciences & Ecology
关键词[WOS]OXYGEN-HYDROGEN SYSTEM ; OXYGEN-HYDROGEN SYSTEM ; ELECTRON-MICROSCOPY ; ELECTRON-MICROSCOPY ; CARBON-MONOXIDE ; CARBON-MONOXIDE ; METHANE ; METHANE ; NICKEL ; NICKEL ; CERIA ; CERIA ; COMBUSTION ; COMBUSTION ; STORAGE ; STORAGE ; SURFACE ; SURFACE ; XRD ; XRD
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.; 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.
语种英语 ; 英语
原文出处查看原文 ; 查看原文
WOS记录号WOS:000183902500001 ; WOS:000183902500001
引用统计
被引频次:167[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/82855
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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GB/T 7714
Shan, WJ,Luo, MF,Ying, PL,et al. Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation, Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation[J]. APPLIED CATALYSIS A-GENERAL, APPLIED CATALYSIS A-GENERAL,2003, 2003,246, 246(1):1-9, 1-9.
APA Shan, WJ,Luo, MF,Ying, PL,Shen, WJ,&Li, C.(2003).Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation.APPLIED CATALYSIS A-GENERAL,246(1),1-9.
MLA Shan, WJ,et al."Reduction property and catalytic activity of Ce1-XNiXO2 mixed oxide catalysts for CH4 oxidation".APPLIED CATALYSIS A-GENERAL 246.1(2003):1-9.
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