Thin carbon layer covered Co4N cubes encapsulated in N-doped porous carbon nanocage as tri-functional catalysts with enhanced charge-transfer efficiency for Zn-air battery and overall water-splitting

Co 4 N encapsulated in a porous nanocage as a tri-functional catalyst are designed, which exhibited high-efficiency activity and long-term durability toward ORR/OER. DFT analyses indicated the existence of Co–N–C as active sites in enhancing the RDS.