Adjustable antiperovskite cobalt-based nitrides as efficient electrocatalysts for overall water splitting

Co-based antiperovskite nitrides (CuNCo 3 /NF and CoN 0.73 Co 3 /NF) for overall water splitting are designed. An alkaline electrolyzer composed of CuNCo 3 /NF and CoN 0.73 Co 3 /NF has low cell voltage of 1.53 V at 10 mA cm −2 and maintains remarkable stability.