Interface engineering of NiSe/Ni_3S_2 nanostructures as an efficient self-supported electrode for water oxidation in alkaline media

摘要

Advancements in nonprecious, efficient, and stable electrocatalysts for oxygen evolution reaction (OER) pathways with large energy barriers are critical to renewable energy techniques. Constructing interface engineering significantly modifies active sites and enhances electronic transfer rate, and can yield exceptional splitting efficiency. Here, we describe an engineered interface on the NiSe/Ni3S2 nanostructures to propel the oxygen evolution in alkaline media. By adjusting the molar ratio of the Se/S precursors, the resulting NiSe/Ni3S2 electrode exhibits a low overpotential of 340 mV (100 mA cm(-2)) for the OER, and as-obtained NiSe/Ni(3)S(2)has tunable interface effects to boost its intrinsic properties. This work opens up a new way to develop cost-effective interfacial electrocatalysts for water splitting utilization.