Core‐Shell Structured CoP@MoS 2 Electrocatalysts for Enhanced Hydrogen Evolution Reaction

Abstract The hierarchical CoP@MoS 2 hybrid was constructed by a solvothermal reaction of MoS 2 nanosheets and CoP nanocubes. The resultant product exhibited a well‐defined core‐shell structure, in which MoS 2 sheets were decorated on the surface of CoP nanocubes. As electrocatalyts of hydrogen evolution reaction (HER), the hybrid displayed a highly superior catalytic activity to pure MoS 2 in acid media with a low overpotential of 201 mV at the current density of 10 mA cm −2 , a small Tafel slope of 70.4 mV dec −1 , and good stability. The excellent HER performance benefitted from the core‐shell morphology as well as the synergistic interaction between MoS 2 and CoP components.