Electronic modulation and synergistic effect on Fe-doped NiSe@NiS composites to improve oxygen evolution performance

In this paper, Fe-doped nickel selenide and nickel sulfide composites was in-situ grown on nickel foam (NF) to prepare Fe-NiSe@NiS/NF by solvothermal method. Benefit from the optimized electron structure by Fe doping, the synergistic effect of NiSe@NiS and faster electron transfer, Fe-NiSe@NiS/NF exhibited excellent OER activity with the overpotential of 330 mV at 150 mA/cm² in 1 mol/L KOH solution. The voltage barely changed after 40 h of test.