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题名: Stabilized Gold Nanoparticles on Ceria Nanorods by Strong Interfacial Anchoring
作者: Ta, Na1;  Liu, Jingyue (Jimmy)1, 2;  Chenna, Santhosh3;  Crozier, Peter A.3;  Li, Yong1;  Chen, Aling1;  Shen, Wenjie1
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2012-12-26
DOI: 10.1021/ja310341j
卷: 134, 期:51, 页:20585-20588
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Au/CeO2 catalysts are highly active for low-temperature CO oxidation and water gas shift reaction, but they deactivate rapidly because of sintering of gold nanoparticles, linked to the collapse or restructuring of the gold-ceria interfacial perimeters. To date, a detailed atomic-level insight into the restructuring of the active gold-ceria interfaces is still lacking. Here, we report that gold particles of 2-4 nm size, strongly anchored onto rod-shaped CeO2, are not only highly active but also distinctively stable under realistic reaction conditions. Environmental transmission electron microscopy analyses identified that the gold nanoparticles, in response to alternating oxidizing and reducing atmospheres, changed their shapes but did not sinter at temperatures up to 573 K. This finding offers a new strategy to stabilize gold nanoparticles on ceria by engineering the gold-ceria interfacial structure, which could be extended to other oxide-supported metal nanocatalysts.
关键词[WOS]: GAS-SHIFT REACTION ;  CO OXIDATION ;  NANOCRYSTALLINE GOLD ;  CARBON-MONOXIDE ;  ACTIVE GOLD ;  CATALYSTS ;  DEACTIVATION ;  PARTICLES ;  METAL ;  CEO2
语种: 英语
WOS记录号: WOS:000313154200005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138021
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
2.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
3.Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA

Recommended Citation:
Ta, Na,Liu, Jingyue ,Chenna, Santhosh,et al. Stabilized Gold Nanoparticles on Ceria Nanorods by Strong Interfacial Anchoring[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2012,134(51):20585-20588.
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