环己酮
空位缺陷
生产(经济)
平面(几何)
材料科学
化学
数学
几何学
经济
结晶学
催化作用
有机化学
宏观经济学
作者
Yang Yang,Guidong Yao,Xiaojuan Zhu,Mengdi Gao,Lili Wang,Shun‐Lin Li,Xuerong Li,Xuezhi Duan,De Chen,Weimin Yang,Ying Wan
出处
期刊:Chem
[Elsevier]
日期:2024-04-01
标识
DOI:10.1016/j.chempr.2024.03.022
摘要
Summary
Selective hydrogenation of phenol is a sustainable alternative to cyclohexane oxidation for the production of cyclohexanone. However, over-hydrogenation of cyclohexanone to cyclohexanol is thermodynamically favorable, limiting its selectivity. Here, we report an unprecedented cyclohexanone selectivity (>99.9%) in continuous-flow phenol hydrogenation using an electron-deficient Pd catalyst. The Pd atom exists in a unique Pd–N5C4 structure in which it is coordinated with four quasi-planar N atoms and one axial N atom in the first shell and an additional four C atoms in the second shell that lie on the curved surface of a pore in ordered mesoporous carbon. The Pd site has a d charge depletion of 1.18 e that prevents cyclohexanone adsorption, which is therefore exclusively produced. Bonding the Pd atom to a curved plane of carbon atoms is an effective way to control the d charge of Pd and increase its selectivity for the green synthesis of fine chemicals.
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