▎ 摘　　要

Developing highly selective, economical and stable catalysts for the electrochemical conversion of CO2 into value-added carbon products to mitigate both CO2 emission and the energy crisis is challenging. We report an efficient and robust electrocatalyst for the CO2 reduction reaction (CO2RR) by embedding CoN4 active sites in a graphene matrix. These highly dispersed CoN4 sites show an extraordinary CO2RR activity, with a high CO Faradaic efficiency of nearly 95% at -0.76 V (vs. RHE) and remarkable durability. The corresponding overpotential is 0.65 V. Our finding could pave the way for the design at the atomic scale of highly efficient electrocatalysts for the CO2RR.