“…Compared with biomass hydrogen production, hydrocarbon pyrolysis and thermochemical water splitting, electrochemical hydrogen evolution has received extensive attention and possesses several advantages such as a simple process, no carbon pollution, and high product purity. 1,2 The oxygen evolution reaction (OER) (2H 2 O ¼ O 2 + 4H + + 4e À ), the half reaction of water splitting, involves the transfer of four electrons and requires a high overpotential (1.23 V), which greatly limits its overall efficiency. 3,4 Therefore, the exploration of highly efficient OER electrocatalysts is a key factor in increasing the efficiency of water splitting.…”