Cu‐Based Organic‐Inorganic Composite Materials for Electrochemical CO2 Reduction

Abstract Electrochemical CO 2 reduction reaction (CO 2 RR) is an attractive pathway to convert CO 2 into value‐added chemicals and fuels. Copper (Cu) is the most effective monometallic catalyst for converting CO 2 into multi‐carbon products, but suffers from high overpotentials and poor selectivity. Therefore, it is essential to design efficient Cu‐based catalyst to improve the selectivity of specific products. Due to the combination of advantages of organic and inorganic composite materials, organic‐inorganic composites exhibit high catalytic performance towards CO 2 RR, and have been extensively studied. In this review, the research advances of various Cu‐based organic‐inorganic composite materials in CO 2 RR, i. e., organic molecular modified‐metal Cu composites, Cu‐based molecular catalyst/carbon carrier composites, Cu‐based metal organic framework (MOF) composites, and Cu‐based covalent organic framework (COF) composites are systematically summarized. Particularly, the synthesis strategies of Cu‐based composites, structure‐performance relationship, and catalytic mechanisms are discussed. Finally, the opportunities and challenges of Cu‐based organic‐inorganic composite materials in CO 2 RR are proposed.