A novel FeS–NiS hybrid nanoarray: an efficient and durable electrocatalyst for alkaline water oxidation

Abstract

It is highly important to develop cost-efficient electrocatalysts for the oxygen evolution reaction (OER). In this communication, we report a novel FeS–NiS hybrid nanosheet array on Ti mesh as a highly efficient non-noble-metal electrocatalyst for OER. This catalyst requires an overpotential of 260 mV to afford a current density of 10 mA cm⁻² in 1.0 M KOH, 100 and 110 mV less than those required for FeS and NiS, respectively. In addition, this catalyst shows good durability, with maintenance of its catalytic activity for at least 25 h.