期刊
INORGANIC CHEMISTRY
卷 61, 期 47, 页码 19010-19021出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.2c03336
关键词
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资金
- CSIR
- MHRD through IIT Ropar for the SRF fellowship
- [2991/2019/EMR-II]
A Cu-Ce metal-organic framework (MOF) was synthesized and carbonized to produce a bimetallic Cu2O-CeO2/C catalyst for the Sonogashira cross-coupling reaction. The catalyst exhibited high photocatalytic activity and catalytic activity, and the structure-activity relationship and reaction mechanism were established.
The development of an economical transition metal based catalyst for photocatalytic carbon-carbon coupling reactions is aspiring. Herein, a Cu-Ce metal-organic framework (MOF) was synthesized and carbonized to produce bimetallic Cu2O-CeO2/C, which was utilized in the Sonogashira cross-coupling reaction. The defects and oxygen vacancies in the catalyst were characterized by Xray photoelectron spectroscopy and Raman spectroscopy, while the nature of Cu was characterized by H2-TPR analysis. The defect induced MOF-derived Cu-Ce heterojunction created more oxygen vacancies (OV) in CeO2, revealing the high photocatalytic activity. The Cu-Ce heterojunction (Cu2O-CeO2/C) formed a Cu(I)- phenylacetylide active complex and exhibited higher catalytic activity for the visible light-induced Sonogashira cross-coupling reaction. 25% Cu2O-CeO2/C offered 93.8% phenylacetylene conversion with a 94.2% Sonogashira product selectivity by using household light-emitting diodes. No discernible activity loss was observed from the recycling of the catalyst. Based on catalytic activity, control reactions, and physicochemical and optoelectronic characterization, the structure-activity relationship was established and a reaction mechanism was proposed. Replacement of the costly Pd metal-based catalyst with a cheap Cu2O-CeO2-based catalyst for the synthesis of commercially important compounds with a sustainable visible light-induced catalytic process will be highly attractive to chemists and industrialists.
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