Advances and Challenges for Electrochemical Reduction of CO2 to CO: From Fundamental to Industrialization.

Electrochemical carbon dioxide reduction reaction (CO2RR) provides an attractive approach to convert renewable electricity into fuels and feedstocks in the form of chemical bonds. Among the different CO2RR pathways, CO2 conversion to carbon monoxide (CO) is considered as one of the most promising candidate reactions in the chemical industry due to its high technologically and economically feasibility. Integrating catalyst and electrolyte design with understanding of catalytic mechanism will yield scientific insights and promote this technology towards industrial implementation. Herein, we review recent advances and challenges for selective CO2 conversion to CO. The intelligent multidimensional catalyst and electrolyte engineering for CO2RR are comprehensively summarized. Furthermore, recent efforts on large-scale production of CO are provided so as to facilitate the industrialization of electrochemical CO2 reduction. To conclude, the remaining technological challenges and future direction of industrialized application of CO2RR to CO are put forward.