Enhanced oxygen evolution catalytic activity of NiS2 by coupling with ferrous phosphite and phosphide

NiS₂/Fe-P nanospheres were developed as an efficient oxygen evolution reaction electrocatalyst with a low overpotential (218 mV @ 10 mA cm⁻² and 306 mV @ 800 mA cm⁻²) and Tafel slope (47.5 mV dec⁻¹).