Unravelling the Origin of the High-Catalytic Activity of Supported Au:A Density-Functional Theory-Based Interpretation

摘要

Gold is considered a rather inert metal in its bulk form;however,it can exhibit unexpectedly catalytic activity when it is highly dispersed on metal oxides.CO oxidation catalyzed by supported gold has been investigated in detail for both its simplicity and its technological importance.The outstanding activity of supported gold particles has been attributed to structural effects as size,shape,and thickness,as well as to support effects.In particular,it is observed that Au supported on reducible oxides,such as TiO_2,has a higher reactivity compared to Au on irreducible oxides,such as MgO and SiO_2.