Knoevenagel冷凝
催化作用
丙二腈
路易斯酸
化学
钴
苯甲醛
热解
无机化学
有机化学
光化学
作者
Yu Guo,Naiyan Wang,Enyuan Gao,Qiaoqiao Wan,Xiang Bai,Xiwen He,Bei Zhao,Yaqing Zhang,Haibin Yu,Qing Liu,Peng Liang,Baiping Xu,Guoming Zhao,Xing Fan
标识
DOI:10.1016/j.mcat.2023.113521
摘要
Nitrogen-doped carbon confined cobalt nanoparticles (Co-N-C) were synthesized through multi-step pyrolysis method. The Co-N-C samples exhibit excellent catalytic performance in the Knoevenagel reaction of benzaldehyde and malononitrile, of which the yield can be as high as 93.7% within 2.5 min with outstanding stability and recyclability. The catalytic performance may be primarily ascribed to the richness in nitrogen and cobalt in the form of the solid Frustrated Lewis Pair (FLP), i.e. the Co ion acts as a Lewis acid site to activate the carbonyl oxygen of benzaldehyde molecules, and nitrogen in carbon acts as a Lewis base site to activate the methylene hydrogen of malononitrile. From the perspective of intrinsic catalytic activity, variations in catalytic properties are attributed to the electron density distribution on the surface of the catalyst.
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