Constructing NiSe(2)@MoS(2) nano-heterostructures on a carbon fiber paper for electrocatalytic oxygen evolution

Although MoS(2) has shown its potential as an electro-catalyst for the oxygen evolution reaction (OER), its research is still insufficient. In this study, as a novel MoS(2)-based heterostructure electro-catalyst for OER, namely NiSe(2)@MoS(2) nano-heterostructure, was constructed on a carbon fiber paper (CFP) substrate by a simple approach, which includes electrochemical deposition of NiSe(2) film and hydrothermal processing of MoS(2) film. In addition to a series of observations on the material structure, electrocatalytic OER performance of NiSe(2)@MoS(2) was fully evaluated and further compared with other MoS(2)-based OER electro-catalysts. It exhibits an outstanding catalytic performance with an overpotential η(10) of 267 mV and a Tafel slope of 85 mV dec(−1). Only 6% loss of current density before and after 10 h indicates its excellent durability. The results indicate that the obtained NiSe(2)@MoS(2) is an excellent OER electro-catalyst and worth exploring as a substitute for noble metal-based materials.