Cooperation of Different Active Sites to Promote CO 2 Electroreduction to Multi-carbon Products at Ampere-Level.

Electroreduction of CO 2 to C 2+ products provides a promising strategy for reaching the goal of carbon neutrality. However, achieving high selectivity of C 2+ products at high current density remains a challenge. In this work, we designed and prepared a multi-sites catalyst, in which Pd was atomically dispersed in Cu (Pd-Cu). It was found that the Pd-Cu catalyst had excellent performance for producing C 2+ products from CO 2 electroreduction. The Faradaic efficiency (FE) of C 2+ products could be maintained at approximately 80.8 %, even at a high current density of 0.8 A cm -2 for at least 20 hours. In addition, the FE of C 2+ products was above 70 % at 1.4 A cm -2 . Experiments and density functional theory (DFT) calculations revealed that the catalyst had three distinct catalytic sites. These three active sites allowed for efficient conversion of CO 2 , water dissociation, and CO conversion, ultimately leading to high yields of C 2+ products.