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Methane combustion over supported palladium catalysts I. Reactivity and active phase
Yang, SW; Maroto-Valiente, A; Benito-Gonzalez, M; Rodriguez-Ramos, I; Guerrero-Ruiz, A
关键词Palladium Alumina Zirconia Methane Combustion Active Phase Ir Co Adsorption Microcalorimetry
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
2000-12-27
28期:3-4页:223-233
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]COMPLETE OXIDATION ; CARBON-MONOXIDE ; LATTICE OXYGEN ; ALPHA-ALUMINA ; PD CATALYST ; SURFACE ; SILICA ; STATE ; CHEMISORPTION ; CRYSTALLITES
英文摘要The performance of Al(2)O(3), ZrO(2) and ZrO(2) stabilized with SiO(2) (ZrO(2)-s) supported palladium catalysts for the methane combustion was studied between 473 and 873 K. The nature of the surface species of palladium catalysts under reaction conditions were detected by FT-IR and microcalorimetry of CO adsorbed. The different behavior of palladium catalysts under reaction conditions is attributed to support effects associated to differences in thermal conductivity and oxygen mobility of supports. Prereduction of the catalysts enhances their activity. Under reaction conditions, the prereduced sample becomes partially oxidized by preferential adsorption/reaction of oxygen both on Pd ( 1 1 1) planes and on the sites that can multibondedly adsorb CO. The reconstruction of the metallic particles and the formation of PdO(x) (01) phase were directly observed by FT-IR and microcalorimetry of adsorbed CO. Combination of different characterization techniques with reaction results suggests that a mixed phase, Pd(0)/PdO(x), is the most active phase for methane combustion, and that a redox mechanism may occur on this phase. (C) 2000 Elsevier Science B.V. All rights reserved.
语种英语
WOS记录号WOS:000166227300008
引用统计
被引频次:113[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/321008/138711
专题中国科学院大连化学物理研究所
作者单位1.Univ Nacl Educ Distancia, Dept Quim Inorgan & Tecn, Fac Ciencias, Madrid 28040, Spain
2.CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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Yang, SW,Maroto-Valiente, A,Benito-Gonzalez, M,et al. Methane combustion over supported palladium catalysts I. Reactivity and active phase[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2000,28(3-4):223-233.
APA Yang, SW,Maroto-Valiente, A,Benito-Gonzalez, M,Rodriguez-Ramos, I,&Guerrero-Ruiz, A.(2000).Methane combustion over supported palladium catalysts I. Reactivity and active phase.APPLIED CATALYSIS B-ENVIRONMENTAL,28(3-4),223-233.
MLA Yang, SW,et al."Methane combustion over supported palladium catalysts I. Reactivity and active phase".APPLIED CATALYSIS B-ENVIRONMENTAL 28.3-4(2000):223-233.
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