Facile fabrication of carbon fiber skeleton structure of MoS2 supported on 2D MXene composite with highly efficient and stable hydrogen evolution reaction.

Development of advanced electrocatalytic materials is the crucial technology in electrolytic water to produce clean hydrogen energy. Herein, we have developed a highly efficient and stable hydrogen evolution reaction (HER) electrocatalyst MoS 2 /Ti 3 C 2 @CNFs hybrid material, which obtained by sulfur vapor assisted graphitization of Mo/Ti 3 C 2 @PAN precursor. Conductive Ti 3 C 2 MXene and carbon nanofiber (CNFs) were applied to construct the "plane-line" skeleton structure to effectively prevent the stacking of Ti 3 C 2 flakes, increase the loading content of MoS 2 , enlarge the exposure active edge sites of MoS 2 and accelerate charger transfer of MoS 2. MoS 2 /Ti 3 C 2 @CNFs exhibits excellent electrocatalytic activity and high stability in HER compared to pure MoS 2 and MoS 2 /Ti 3 C 2 nanostructure. The excellent performance of MoS 2 /Ti 3 C 2 @CNFs in HER is attributed to the special characteristics of the skeleton structure and the strong interface coupling between MoS 2 and Ti 3 C 2 MXene. Our findings provide a viable approach for designing advanced nanostructures for catalysis, electronic devices, and other potential applications. [Display omitted] • A kind of MXene matrix material with fiber skeleton is constructed. • The fiber skeleton can be used as a synergistic carrier of molybdenum disulfide. • The chemical coupling of the loading interface gives the material high chemical stability. • MoS 2 /Ti 3 C 2 @CNFs exhibits excellent electrocatalytic activity with a small overpotential and Tafel slope of 113 mV·dec−1. [ABSTRACT FROM AUTHOR]