Built-in electric field control of electron redistribution (NiFe-based electrocatalyst) with efficient overall water splitting at industrial temperature

FeO(OH)/NiFe-LDH-2||Fe7S8(NiS)/NiFe-LDH 7 S 8 (NiS)/NiFe-LDH had excellent overall water splitting performance and excellent stability at high temperatures. Firstly, FeO(OH)/NiFeLDH-2 catalyst with excellent OER performance was synthesized by solvothermal method. Subsequently, it was sulfurized to obtain the Fe7S8(NiS)/NiFe-LDH 7 S 8 (NiS)/NiFe-LDH catalyst with excellent HER performance. The heterostructure in the synthesized material promoted the rearrangement of electrons in the material. Then, the d-band center of the material was calculated, and it was obtained that the movement of the d-band center optimized the adsorption of the intermediate during the catalytic reaction. Finally, the stability test of the material showed that the material not only had excellent stability at room temperature, but also had excellent stability at industrial temperature.