【作者】 郑南峰；

【Author】 Nanfeng Zheng;State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University;

【机构】 厦门大学化学化工学院固体表面物理化学国家重点实验室；

【摘要】 纳米材料多不具备金属配合物等经典化合物所拥有的分子结构确定性和单晶表面的结构完美性,当前尚未形成可以有效指导纳米材料的设计合成和性能优化的共识性理论。在材料合成中,引入特定分子与金属纳米材料表面形成配位键,往往会影响其表面能,进而调控表面结构/形貌;而在构效关系研究和性能优化方面,认识并理解配位分子在纳米材料表界面上的成键、断键等表界面微观化学过程是破解其独特化学性能和纳米效应本质的关键。本报告将重点汇报我们在纳米材料表面配位化学方面的进展[1]:1)采用表面配位化学的策略实现对金属纳米晶体形貌、裸露晶面的调控,并研究相关晶面效应;2)在金属纳米晶表面构筑特定的金属-有机、金属-无机界面,解析相关界面的精细配位结构,并深入研究相关表界面基元在催化中的分子作用机制[2-4];3)以单原子分子贵金属催化剂中研究纳米催化剂中的金属-载体界面分子作用机制[5];4)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-配体界面的催化协同机制。更多还原

【Abstract】 The surface and interfacial structures of nanomaterials play crucial roles in determining their chemical properties. However, it remains challenging to characterize and precisely control the surface and interfacial structures of nanomaterials. In this presentation, I will discuss how the surface coordination chemistry controls the properties of metal nanomaterials at the molecular level. The mechanism on how small ligands help to control the surface structure and thus catalysis of metal nanocrystals will be discussed. Some examples will also be given toward understanding the significant steric and electronic effects of surface ligands on promoting the(electro)catalysis of metal nanomaterials, particularly their catalytic selectivity. Finally, two synthetic strategies to create model catalysts for resolving the detailed metal-support interfacial structures will be presented.更多还原