Stabilization of Cu/Ni Alloy Nanoparticles with Graphdiyne Enabling Efficient CO2 Reduction

Electrocatalysis has become an attractive strategy for the artificial reduction of CO2 to high-value chemicals.However,the design and development of highly selective and stable non-noble metal electrocatalysts that convert CO2 to CO are still a challenge.As a new type of two-dimensional carbon material,graphdiyne(GDY),is rarely used to explore the application in carbon dioxide reduction reaction(CO2RR).Therefore,we tried to use GDY as a substrate to stabilize the copper-nickel alloy nanoparticles(NPs)to synthesize Cu/Ni@GDY.Cu/Ni@GDY requires an overpotential(-0.61 V)to 10 mA/cm2 for the formation of CO,and it shows better activity than Au and Ag,achieving a higher Faraday efficiency of about 95.2％and high stability of about 26 h at an overpotential(-0.70 V).The electronic interaction between GDY substrate and Cu/Ni alloy NPs and the large specific surface area of GDY is responsible for the high performance.