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题名: Au/ZrO2 catalysts for low-temperature water gas shift reaction: Influence of particle sizes
作者: Li, Juan1;  Ta, Na1;  Song, Wei1;  Zhan, Ensheng1;  Shen, Wenjie1
通讯作者: 申文杰
关键词: Au/ZrO2 ;  Particle size ;  Contact boundary ;  Water gas shift ;  Low-temperature
刊名: GOLD BULLETIN
发表日期: 2009
卷: 42, 期:1, 页:48-60
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Inorganic & Nuclear ;  Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: The size effects of Au and ZrO2 particles on the structural property and the catalytic performance of Au/ZrO2 catalysts for the water gas shift reaction were extensively investigated. It was found that the Au-ZrO2 contact boundaries played essential roles in determining the catalytic reactivity. By keeping the size of Au particle to be similar to 3 nm, the increase in the particle size of ZrO2 from similar to 7 nm to similar to 55 nm caused significant decrease in the reaction rate. When the particle size of ZrO2 was fixed at similar to 20 nm, the conversion of CO decreased greatly with increasing the size of gold particle from 2.9 to 6.2 nm. IR spectroscopy and kinetic study revealed that the water gas shift reaction occurred at the Au-ZrO2 contact boundaries, where CO is adsorbed on the Au species and H2O is activated on the surface of ZrO2 through the formation of formate species, acting as key reaction intermediates.
关键词[WOS]: CO OXIDATION ;  GOLD CATALYSTS ;  AU/CEO2 CATALYSTS ;  PRETREATMENT CONDITIONS ;  AU-CEO2 CATALYSTS ;  SUPPORTED AU ;  ZIRCONIA ;  HYDROGEN ;  AU/TIO2 ;  CERIA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000265079200007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101623
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:
Li, Juan,Ta, Na,Song, Wei,et al. Au/ZrO2 catalysts for low-temperature water gas shift reaction: Influence of particle sizes[J]. GOLD BULLETIN,2009,42(1):48-60.
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