“…To meet the challenges of energy crisis and develop alternative energy sources for traditional fossil fuels, the development of new energy devices has become very important for future economic and strategic development. [1][2][3][4][5][6] Among various energy storage systems to obtain renewable hydrogen production, electrocatalytic water splitting, which contains two half reactions of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), is probably one of the most achievable methods. [7][8][9][10] However, hydrogen is considered as a clean energy source due to its high energy density, easy purication and environmental friendliness.…”