一氧化碳
催化作用
近程
氢
化学
金属
多相催化
基质(水族馆)
化学工程
碳纤维
活动中心
一氧化碳
材料科学
组合化学
光化学
无机化学
有机化学
复合材料
工程类
地质学
海洋学
复合数
作者
Yanyan Zhao,Sheng Dai,Ke Yang,Sufeng Cao,Kelly L. Materna,Hannah M. C. Lant,Li Cheng Kao,Xuefei Feng,Jinghua Guo,Gary W. Brudvig,Maria Flytzani-Stephanopoulos,Victor S. Batista,Xiaoqing Pan,Dunwei Wang
标识
DOI:10.1073/pnas.2206850120
摘要
Atomically dispersed catalysts have been shown highly active for preferential oxidation of carbon monoxide in the presence of excess hydrogen (PROX). However, their stability has been less than ideal. We show here that the introduction of a structural component to minimize diffusion of the active metal center can greatly improve the stability without compromising the activity. Using an Ir dinuclear heterogeneous catalyst (DHC) as a study platform, we identify two types of oxygen species, interfacial and bridge, that work in concert to enable both activity and stability. The work sheds important light on the synergistic effect between the active metal center and the supporting substrate and may find broad applications for the use of atomically dispersed catalysts.
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