The support effect on the size and catalytic activity of thiolated Au_(25) nanoclusters as precatalysts

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• 英文论文题名：The support effect on the size and catalytic activity of thiolated Au_(25) nanoclusters as precatalysts
• 论文作者：Jun Fang ; Yang Yang ; Jianping Xie ; Ning Yan
• 英文论文作者：Jun Fang ; Yang Yang ; Jianping Xie ; Ning Yan ; State Key Laboratory of Materials-Oriented Chemical Engineering ; Nanjing Tech University ; Department of Chemical and Biomolecular Engineering ; National University of Singapore
• 年：2016
• 作者机构：State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University;Department of Chemical and Biomolecular Engineering,National University of Singapore;
• 英文论文关键词：Au_(25) nanoclusters ; heterogeneous catalysis ; size effect ; support effect
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第十五分会：表界面结构调控与催化
• 语种：英文
• 分类号：O643.36
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第十五分会 ; 表界面结构调控与催化
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：253k
• 原文格式：D
• 会议级别：全国

摘要

Thiolate-protected Au nanoclusters(or thiolated Au NCs) are very promising catalysts due to their well-defined cluster size(atomic precision) and structure(atomically resolved).So thiolated Au NCs provide an ideal platform to reveal certain fundamental issues related to Au-based catalytic reactions.In this study,6-mercaptohexanoic(MHA) protected Au25(MHA)18 nanoclusters(or thiolated Au NCs) deposited on various inorganic supports,including hydroxyapatite(HAP),TiO_2(Degussa P25),activated carbon(AC),pyrolyzed graphene oxide(PGO),and fumed SiO_2 were prepared via a conventional impregnation method.Following that,calcination under a N2 stream was conducted to produce surface ligand-free,highly dispersed Au NCs catalysts.The effects of supports on the size and catalytic activity of Au NCs were systematically investigated.Both the size effect and metal–support interaction are crucial for the design of supported Au NCs as efficient catalysts for targeted reactions.
Thiolate-protected Au nanoclusters(or thiolated Au NCs) are very promising catalysts due to their well-defined cluster size(atomic precision) and structure(atomically resolved).So thiolated Au NCs provide an ideal platform to reveal certain fundamental issues related to Au-based catalytic reactions.In this study,6-mercaptohexanoic(MHA) protected Au25(MHA)18 nanoclusters(or thiolated Au NCs) deposited on various inorganic supports,including hydroxyapatite(HAP),TiO_2(Degussa P25),activated carbon(AC),pyrolyzed graphene oxide(PGO),and fumed SiO_2 were prepared via a conventional impregnation method.Following that,calcination under a N2 stream was conducted to produce surface ligand-free,highly dispersed Au NCs catalysts.The effects of supports on the size and catalytic activity of Au NCs were systematically investigated.Both the size effect and metal–support interaction are crucial for the design of supported Au NCs as efficient catalysts for targeted reactions.

引文

[1]Fang,J.;Xie,J.P.;Yan,N.et al.Nanoscale 2015,7:6325.
    [2]Li,G.;Jin,R.C.Acc.Chem.Res.2013,46,1749.
    [3]Yamazoe,S.;Koyasu,K.;Tsukuda,T.Acc.Chem.Res.2014,47:816.