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题名: Influence of Au particle size on Au/CeO2 catalysts for CO oxidation
作者: Tana1;  Wang, Fagen1;  Li, Huaju1;  Shen, Wenjie1
关键词: Au/CeO2 ;  Particle size ;  Au-CeO2 interface ;  CO oxidation
刊名: CATALYSIS TODAY
发表日期: 2011-10-25
DOI: 10.1016/j.cattod.2011.04.027
卷: 175, 期:1, 页:541-545
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The Au particle size dependence of CO oxidation on Au/CeO2 catalysts was extensively investigated. By keeping the size of CeO2 particle to be about 12 nm, the increasing size of Au particle from 3.9 to 7.5 nm caused significant decrease in the intrinsic activity for CO oxidation. Comparative study on sodium cyanide leaching, which effectively removed the metallic gold particles but retained the cationic gold clusters in the matrix of ceria, revealed that the cationic gold species could catalyze CO oxidation only at higher temperatures, confirming the major contribution of the metallic gold particles in the Au/CeO2 system. Therefore, it is evident that the Au-CeO2 interface determined mainly by the size of Au particle plays an essential role in achieving the high reactivity. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: WATER-GAS SHIFT ;  GOLD CATALYSTS ;  HYDROGEN-PRODUCTION ;  SUPPORTED GOLD ;  PRECIPITATION ;  NANOPARTICLES ;  REACTIVITY ;  OXYGEN
语种: 英语
WOS记录号: WOS:000295735400076
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142362
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:
Tana,Wang, Fagen,Li, Huaju,et al. Influence of Au particle size on Au/CeO2 catalysts for CO oxidation[J]. CATALYSIS TODAY,2011,175(1):541-545.
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