金原子簇催化应用的研究进展

在最近的10年里,原子精确的金原子簇(AunLm,L为有机配体)已经被证明是一种新型的纳米金催化剂.不同尺寸的AunLm催化剂表现出独特的电子和晶体结构,为关联催化性能和催化剂结构的内在关系及研究纳米金催化的化学反应机制提供了新的研究平台.在这篇综述中,主要介绍金原子簇催化剂在催化反应中的应用,如选择性氧化和加氢,及C—C偶联反应等,同时,也讨论金原子簇催化剂的尺寸效应、配体效应(例如,芳香族vs脂肪族)、杂金属掺杂(如铜、银、钯、铂)等.最后,在原子尺度上研究了金原子簇催化的反应机制以及结构-活性的构建关系.

A critical review on the catalytic applications of gold nanoclusters

In recent decade,gold nanoclusters with precise numbers of Au atom (Aun Lm , where L = ligand ) have been demonstrated as a new and promising class of nanogold catalysts.The Aun Lm nanocluster catalysts of different sizes possess novel crystal and electronic structures,thereby providing an excellent opportunity to correlate the intrinsic catalytic performance with the nanocluster catalysts ' structure, as well as to study mechanisms of chemical reactions catalyzed by gold nanoparticles.In this review,the authors demonstrated the key roles played by the gold nanoclusters for the catalytic reactions,such as selective oxidation and hydrogenation and C—C coupling reactions.Tailoring of the catalysts'functions is discussed in terms of size-specificity, ligand engineering (e.g., aromatic vs aliphatic),and doping effects (e.g.,Cu,Ag,Pd,Pt).The proposed reactions' mechanisms and the structure-activity relationships at the atomic detail are presented.