催化作用
金属
材料科学
过渡金属
同种类的
贵金属
化学物理
纳米技术
纳米材料基催化剂
胶体金
纳米颗粒
化学
冶金
有机化学
物理
热力学
作者
Dan Yang,Wei Pei,Si Zhou,Jijun Zhao,Weiping Ding,Yan Zhu
标识
DOI:10.1002/anie.201913635
摘要
Gold nanoparticles in metallic or plasmonic state have been widely used to catalyze homogeneous and heterogeneous reactions. However, the catalytic behavior of gold catalysts in non-metallic or excitonic state remain elusive. Atomically precise Aun clusters (n=number of gold atoms) bridge the gap between non-metallic and metallic catalysts and offer new opportunities for unveiling the hidden properties of gold catalysts in the metallic, transition regime, and non-metallic states. Here, we report the controllable conversion of CO2 over three non-metallic Aun clusters, including Au9 , Au11 , and Au36 , towards different target products: methane produced on Au9 , ethanol on Au11 , and formic acid on Au36 . Structural information encoded in the non-metallic clusters permits a precise correlation of atomic structure with catalytic properties and hence, provides molecular-level insight into distinct reaction channels of CO2 hydrogenation over the three non-metallic Au catalysts.
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