Recent Advances of Core-Shell Cu-Based Catalysts for the Reduction of CO 2 to C 2+ Products.

Copper is a key metal for carbon dioxide (CO 2 ) reduction reaction, which can reduce CO 2 to value-added products. The core-shell structure can effectively promote the C-C coupling process due to its strong synergistic effect originated from its unique electronic structure and interface environment. Therefore, the combination of copper and core-shell structure to design an efficient Cu-based core-shell structure catalyst is of great significance for electrocatalytic CO 2 reduction (CO 2 RR). In this review, we first briefly summarize the basic principle of CO 2 RR. In addition, we outline the advantages of core-shell structure for catalysis. Then, we review the recent research progresses of Cu-based core-shell structures for the selective reduction of multi-carbon (C 2+ ) products. In the end, the challenges of using core-shell catalyst for CO 2 RR are described, and the future development of this field is prospected.