Fabrication of Nickel–Cobalt Bimetal Phosphide Nanocages for Enhanced Oxygen Evolution Catalysis

Ni–Co bimetal phosphide nanocages as highly efficient and robust electrocatalysts are synthesized by using Cu 2 O nanocubes templates. Through accurate regulation of Co doping concentration, the optimum oxygen evolution reaction performance can be achieved. Theoretical analysis suggests that the Co incorporation into Ni 2 P effectively optimizes the electronic structures of bimetal phosphide catalysts and enhances their interaction with reactants.