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Defect-Mediated Gold Substitution Doping in ZnO Mesocrystals and Catalysis in CO Oxidation
Liu, Ming-Han1,2; Chen, Yun-Wen3; Liu, Xiaoyan1,2,4; Kuo, Jer-Lai3; Chu, Ming-Wen2; Mou, Chung-Yuan1,2
KeywordMesocrystal Gold Zno Defect Substitution Co Oxidation Catalysis
Source PublicationACS CATALYSIS
2016
ISSN2155-5435
DOI10.1021/acscatal.5b02093
Volume6Issue:1Pages:115-122
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordDOPED OXIDES ; MECHANISM ; SUPPORT ; OXYGEN ; NANOSTRUCTURES ; NANOPARTICLES ; SPECTROSCOPY ; ADSORPTION ; VACANCIES ; INSIGHTS
AbstractHighly 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.
Language英语
WOS IDWOS:000367706800013
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/171461
Collection中国科学院大连化学物理研究所
Corresponding AuthorChu, Ming-Wen
Affiliation1.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
2.Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan
3.Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan
4.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
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.
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