亚纳米表界面化学
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- 英文论文题名：Surface and Interface Chemistry at the Sub-Nanometer Scale
- 论文作者：郑南峰
- 英文论文作者：Nanfeng Zheng ; Collaborative Innovation Center of Chemistry for Energy Materials ; State Key Laboratory of Physical Chemistry of Solid Surfaces ; College of Chemistry and Chemical Engineering ; Xiamen University
- 年：2016
- 作者机构：厦门大学化学化工学院能源材料化学协同创新中心固体表面物理化学国家重点实验室;
- 论文关键词：贵金属 ; 纳米晶 ; 表界面化学 ; 纳米团簇 ; 界面效应
- 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-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：TB383.1;O647.11
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 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：111k
- 原文格式：D
- 会议级别：全国
摘要
纳米材料的化学性能与其表界面结构密切相关,在亚纳米尺度上理解相关材料的表界面化学过程是优化其性能的关键。但当前我们却缺失表征纳米材料表面非晶态超薄层、有机保护层结构的有力手段,这一现状阻碍了我们在分子水平上对纳米材料表界面过程的直接研究。针对这一难题,近年来我们课题组一直努力于发展模型纳米材料体系,在构筑相关体系的基础上,利用球差矫正电子显微镜、同步辐射X-射线吸收光谱等先进表征手段解析纳米活性表界面的精细结构,并结合理论计算以实现在亚纳米尺度上深入理解纳米材料表界面过程的化学本质。本报告将通过如下例子汇报我们在相关方面的主要进展:(1)通过在预合成贵金属纳米晶体上沉积超薄(氢)氧化物层,构筑方便研究金属-无机载体界面效应的模型纳米催化材料,并理解其界面协同机制~[1];(2)以有机保护的超细金属纳米结构为模型催化剂,深入纳米表面配位结构及其在催化性能调控中的界面电子效应~[2];(3)以纳米团簇为研究纳米表面配位化学的分子模型体系,理解金属-配体界面在催化中的协同机制~[3]。
Chemical properties of nanomaterials highly depend on their surface and interface structures. The lack of effective tools to characterize the detailed structures on nanomaterials at the sub-nanometer scale prevents us from deeply understand their surface processes at the molecular level. To tackle such a challenging issue, during the past years, our group has been developing model nanomaterial systems to facilitate the characterizations of surface and interface structures of metal nanomaterials and deeply understand their structure-properties correlations. In this talk, we will discuss our recent progress in the field by using the following examples: 1) Depositing sub-monolayer metal(hydr)oxide on pre-made metal nanocrystals to investigate the metal-support effect; 2) Preparing organic-capped ultrathin metal nanostructures to study the interfacial electronic effect; 3) Using atomically precise metal nanoclusters to study the promoting effect of surface capping organics on catalysis of metal nanoparticles.
Chemical properties of nanomaterials highly depend on their surface and interface structures. The lack of effective tools to characterize the detailed structures on nanomaterials at the sub-nanometer scale prevents us from deeply understand their surface processes at the molecular level. To tackle such a challenging issue, during the past years, our group has been developing model nanomaterial systems to facilitate the characterizations of surface and interface structures of metal nanomaterials and deeply understand their structure-properties correlations. In this talk, we will discuss our recent progress in the field by using the following examples: 1) Depositing sub-monolayer metal(hydr)oxide on pre-made metal nanocrystals to investigate the metal-support effect; 2) Preparing organic-capped ultrathin metal nanostructures to study the interfacial electronic effect; 3) Using atomically precise metal nanoclusters to study the promoting effect of surface capping organics on catalysis of metal nanoparticles.
引文
[1]Chen,G.X.;Zhao,Y.;Fu,G.;Duchesne,P.N.;Gu,L.;Zheng,Y.P.;Weng,X.F.;Chen,M.S.;Zhang,P.;Pao,C.-W.;Lee,J.-F.;Zheng,N.F.Science 2014,344,495.
[2]Chen,G.X.;Xu,C.F.;Huang,X.Q.;Ye,J.Y.;Gu,L.;Li,G.;Tang,Z.C.;Wu,B.H.;Yang,H.Y.;Zhao,Z.P.;Zhou,Z.Y.;Fu,G.;Zheng,N.F.Nature Mater.2016,16,DOI:10.1038/nmat4555.
[3]Wang,Y.;Wan,X.K.;Ren,L.T.;Su,H.F.;Li,G.;Malola,S.;Lin,S.C.;Tang,Z.C.;H?kkinen,H.;Teo,B.K.;Wang,Q.M.;Zheng,N.F.J.Am.Chem.Soc.2016,138,3278.
[2]Chen,G.X.;Xu,C.F.;Huang,X.Q.;Ye,J.Y.;Gu,L.;Li,G.;Tang,Z.C.;Wu,B.H.;Yang,H.Y.;Zhao,Z.P.;Zhou,Z.Y.;Fu,G.;Zheng,N.F.Nature Mater.2016,16,DOI:10.1038/nmat4555.
[3]Wang,Y.;Wan,X.K.;Ren,L.T.;Su,H.F.;Li,G.;Malola,S.;Lin,S.C.;Tang,Z.C.;H?kkinen,H.;Teo,B.K.;Wang,Q.M.;Zheng,N.F.J.Am.Chem.Soc.2016,138,3278.