Defect-Mediated Gold Substitution Doping in ZnO Mesocrystals and Catalysis in CO Oxidation

doi:10.1021/acscatal.5b02093

	Defect-Mediated Gold Substitution Doping in ZnO Mesocrystals and Catalysis in CO Oxidation
	Liu, Ming-Han 2,4; Chen, Yun-Wen 3; Liu, Xiaoyan 1,2,4; Kuo, Jer-Lai 3; Chu, Ming-Wen 2; Mou, Chung-Yuan 2,4
刊名	ACS CATALYSIS
	2016
卷号	6 期号:1 页码:115-122
关键词	Mesocrystal Gold Zno Defect Substitution Co Oxidation Catalysis
ISSN号	2155-5435
DOI	10.1021/acscatal.5b02093
文献子类	Article
英文摘要	Highly dispersed supported gold with strong metal support interaction is a desirable material for heterogeneous catalysis. Unlike current dispersion strategies of depositing gold from solution to support, we report herein a new method of producing highly dispersed gold clusters on ZnO rnesocrystal. The gold clusters appeared on defect-rich twin-brush ZnO mesocrystals (TB-ZnO) via an in-and-out process: (i) a mixed Au/Zn oxide was formed first after deposition-precipitation of Au with AuCl4-, (ii) fine Au clusters grow from the underneath to the surface of the oxide after heating. The TB-ZnO behaved like a sponge allowing gold atoms to heavily disperse into the wurtzite structure of ZnO with Zn-substitution by gold. After mild thermal treatment, the embedded gold emerged from underneath of the ZnO support to form highly dispersed Au nanoparticles of similar to 2 nm on the ZnO surface. DFT calculation shows energetically favored Au-doping in TB-ZnO and facile defect-mediated migration of Au in it. The material (Au/TB-ZnO) gave outstanding activities for the catalysis of CO oxidation. The use of mesocrystals of metal oxide as supports, with rich vacancy defects, provides a new route for preparing highly dispersed and active supported metal catalysts.
WOS关键词	DOPED OXIDES ; MECHANISM ; SUPPORT ; OXYGEN ; NANOSTRUCTURES ; NANOPARTICLES ; SPECTROSCOPY ; ADSORPTION ; VACANCIES ; INSIGHTS
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000367706800013
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/171460]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Chu, Ming-Wen
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan 3.Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan 4.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
推荐引用方式 GB/T 7714	Liu, Ming-Han,Chen, Yun-Wen,Liu, Xiaoyan,et al. Defect-Mediated Gold Substitution Doping in ZnO Mesocrystals and Catalysis in CO Oxidation[J]. ACS CATALYSIS,2016,6(1):115-122.
APA	Liu, Ming-Han,Chen, Yun-Wen,Liu, Xiaoyan,Kuo, Jer-Lai,Chu, Ming-Wen,&Mou, Chung-Yuan.(2016).Defect-Mediated Gold Substitution Doping in ZnO Mesocrystals and Catalysis in CO Oxidation.ACS CATALYSIS,6(1),115-122.
MLA	Liu, Ming-Han,et al."Defect-Mediated Gold Substitution Doping in ZnO Mesocrystals and Catalysis in CO Oxidation".ACS CATALYSIS 6.1(2016):115-122.