基于金属钴配合物的均相光催化还原二氧化碳研究进展

Advances on Molecular Systems for Photocatalytic CO_2 Reduction Based on Cobalt Complexes as Catalysts

本文综述了自20世纪80年代以来基于钴配合物的均相光催化二氧化碳还原研究成果,以钴配合物催化剂的结构分类并结合时间顺序回顾了近四十年来该领域的发展轨迹,重点总结了用于光催化二氧化碳还原研究的金属钴配合物的结构、催化活性以及光催化体系的构成等特点,分析了该领域面临的挑战并展望了未来的发展方向。

Photocatalytic CO2 reduction is a major part of the study of artificial photosynthesis.The conversion of molecule CO2 into fuels,precursor to fuels,or value-added chemicals through visible light induced photocatalysis is considered as an ideal way of fixation and resource utilization of CO2.Metal complexes as molecular catalysts for CO2 reduction had long been used in photocatalytic CO2 reduction systems for its tunable structure,rich valences of contained metal,easy synthesis,and economic advantages.The study of utilization of cobalt complexes as catalysts for photocatalytic CO2 reduction dates from 1980 s.A large number of cobalt complexes of Co-macrocycles,Co-porphyrin and its analogues,Co-polypyridine complexes had been developed as catalysts to mediate CO2-CO or CO2-formate conversion in particular photocatalytic CO2 reduction systems.Herein,we review the development and advances of the study on molecular systems for photocatalytic CO2 reduction based on cobalt complexes as catalysts.The cobalt complexes used in photocatalytic CO2 reduction systems are classified and discussed.The structures,mechanisms,and composition of systems are reviewed.In the end of the review,a summary and outlook are given.