Molecular enhancement of Cu-based catalysts for CO 2 electroreduction.

The electrochemical carbon dioxide reduction reaction (eCO 2 RR) represents an effective means of achieving renewable energy storage and a supply of carbon-based raw materials. However, there are still great challenges in selectively producing specific hydrocarbon compounds. The unique ability of the copper (Cu) catalyst to promote proton-coupled electron transfer processes offers clear advantages in generating value-added products. This review presents molecular enhancement strategies for Cu-based catalysts for CO 2 electroreduction. We also elucidate the principles of each strategy for enhancing eCO 2 RR performance, discuss the structure-activity relationships, and propose some promising molecular enhancement strategies. This review will provide guidance for the development of organic-inorganic hybrid Cu-based catalysts as high-performance CO 2 electroreduction catalysts.