Copper hydroxide/basic copper salt derived Cu0 with a clear grain boundary for selective electrocatalytic CO2 reduction to produce multicarbon products

Cu(OH) 2 /basic copper salt compounds are in situ reduced to Cu 0 nanoparticles with clear grain boundaries during the electrocatalytic CO 2 reduction process, which endows the derived Cu electrocatalyst with high selectivity towards C 2+ products.