“…The overconsumption of non-renewable fossil energy such as coal and oil has resulted in serious environmental problems. − Against the backdrop of goal of carbon peaking and carbon neutrality, the renewable and clean energy such as solar energy, hydrogen, wind energy, and so on has developed rapidly. − Hydrogen, as a kind of low-carbon, clean, and sustainable energy, has been regarded as an alternative to fossil fuels. − Electrocatalytic overall water splitting is considered an efficient technology to produce hydrogen owing to its clean and sustainability. − Water electrolysis process has two half reactions: hydrogen evolution reaction (HER) and oxygen evolution reaction. , However, the high overpotential and sluggish kinetics limit the development of HER, which influences the efficiency of electrocatalytic overall water splitting. It is necessary to develop an efficient hydrogen evolution catalyst to improve the efficiency of HER. − …”