Proton Transfer Dynamics‐Mediated CO2 Electroreduction

Abstract Electrochemical CO 2 reduction reaction (CO 2 RR) is crucial to addressing environmental crises and producing chemicals. Proton activation and transfer are essential in CO 2 RR. To date, few research reviews have focused on this process and its effect on catalytic performance. Recent studies have demonstrated ways to improve CO 2 RR by regulating proton transfer dynamics. This Concept highlights the use of regulating proton transfer dynamics to enhance CO 2 RR for the target product and discusses modulation strategies for proton transfer dynamics and operative mechanisms in typical systems, including single‐atom catalysts, molecular catalysts, metal heterointerfaces, and organic‐ligand modified metal catalysts. Characterization methods for proton transfer dynamics during CO 2 RR are also discussed, providing powerful tools for the hydrogen‐involving electrochemical study. This Concept offers new insights into the CO 2 RR mechanism and guides the design of efficient CO 2 RR systems.