催化作用
选择性
材料科学
反应性(心理学)
钴
合金
吸附
铜
化学工程
相(物质)
化学
冶金
物理化学
有机化学
医学
替代医学
病理
工程类
作者
Sihang Liu,Chengsheng Yang,Shenjun Zha,Dmitry Sharapa,Felix Studt,Zhi‐Jian Zhao,Jinlong Gong
标识
DOI:10.1002/ange.202109027
摘要
Abstract Cobalt‐copper (CoCu) catalysts have industrial potential in CO/CO 2 hydrogenation reactions, and CoCu alloy has been elucidated as a major active phase during reactions. However, due to elemental surface segregation and dealloying phenomena, the actual surface morphology of CoCu alloy is still unclear. Combining theory and experiment, the dual effect of surface segregation and varied CO coverage over the CoCu(111) surface on the reactivity in CO 2 hydrogenation reactions is explored. The relationship between C−O bond scission and further hydrogenation of intermediate *CH 2 O was discovered to be a key step to promote ethanol production. The theoretical investigation suggests that moderate Co segregation provides a suitable surface Co ensemble with lateral interactions of co‐adsorbed *CO, leading to promoted selectivity to ethanol, in agreement with theory‐inspired experiments.
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