ZnS–SnS–NiCo2S4: a new breakthrough in quaternary sulfide composites for the oxygen evolution reaction

Abstract

A ZnS–SnS–NiCo₂S₄ composite was in situ fabricated on Ni foam by polymetallic compositing of Ni₃S₂. The optimized catalyst exhibits outstanding OER performance with a low overpotential (149 mV at 10 mA cm⁻²) and Tafel slope (33.57 mV dec⁻¹), offering a promising strategy for efficient water splitting and sustainable hydrogen production.