Carbon Catalysts for Electrochemical CO2 Reduction toward Multicarbon Products

Abstract Electrochemical CO 2 reduction offers a compelling route to mitigate atmospheric CO 2 concentration and store intermittent renewable energy in chemical bonds. Beyond C 1 , C 2+ feedstocks are more desirable due to their higher energy density and more significant market need. However, the CO 2 ‐to‐C 2+ reduction suffers from significant barriers of CC coupling and complex reaction pathways. Due to remarkable tunability over morphology/pore architecture along with great feasibility of functionalization to modify the electronic and geometric structures, carbon materials, serving as active components, supports, and promoters, provide exciting opportunities to tune both the adsorption properties of intermediates and the local reaction environment for the CO 2 reduction, offering effective solutions to enable CC coupling and steer C 2+ evolution. However, general design principles remain ambiguous, causing an impediment to rational catalyst refinement and application thrusts. This review clarifies insightful design principles for advancing carbon materials. First, the current performance status and challenges are discussed and effective strategies are outlined to promote C 2+ evolution. Further, the correlation between the composition, structure, and morphology of carbon catalysts and their catalytic behavior is elucidated to establish catalytic mechanisms and critical factors determining C 2+ performance. Finally, future research directions and strategies are envisioned to inspire revolutionary advancements.