MXene composite with Ni/Co sulfide for enhanced hydrogen evolution reaction

Abstract

To produce clean and green hydrogen energy from electrolytic water, better electrocatalytic materials need to be developed. Herein, we reported the development of a Ti₃C₂ MXene@Ni/Co sulfide hybrid material for the use in hydrogen evolution reaction (HER) process, which is effective and stable. The shape of metal sulfide and its interactions with Ti₃C₂ MXene caused electronic coupling. This increased both the exposed metal sulfide's active edge sites and the charge-transfer speed. When compared with pure MXene and Ti₃C₂ MXene@NiS nanostructure, Ti₃C₂ MXene@Co₄S₃ exhibited outstanding electrocatalytic activity and stability in the HER process. The unique properties of the skeletal structure and the robust interface interaction between Co₄S₃ and MXene are responsible for the superior performance of Ti₃C₂ MXene@Co₄S₃ in the HER process. Our research offers a practical method to synthesize specialized nanostructures for electrocatalysis, electronics, and other applications.