Synthesis of dense MoS2 nanosheet layers on hollow carbon spheres and their applications in supercapacitors and the electrochemical hydrogen evolution reaction

Abstract

Herein, we report the synthesis of hybrid nanostructures obtained by densely growing MoS₂ nanosheet layers on hydrophobic hollow carbon spheres (abbreviated as MoS₂-HCS) through a solvothermal method. The morphologies and compositions of the MoS₂-HCS hybrid are well investigated. The electrochemical performance of the MoS₂-HCS sphere is investigated in both supercapacitors and the hydrogen evolution reaction. The MoS₂-HCS exhibits a larger specific capacitance of 334 F g⁻¹ than the bare MoS₂ of 204 F g⁻¹ at 1 A g⁻¹, an improved rate capability of 86% from 1 to 20 A g⁻¹ and a stable cycling performance of 87% capacitance retention after 5000 cycles when assembled in a supercapacitor. In addition, MoS₂-HCS also show enhanced electrocatalytic activity for the electrochemical hydrogen evolution reaction in acidic media.