Composite structure of a-MoSX@Ni9S8/NF nanoflower rods for efficient HER under a thermal field

As a high calorific and zero carbon energy source, hydrogen has received a significant amount of attention in recent years. In this work, the amorphous molybdenum sulfide was uniformly and orderly wrapped around the surface of Ni9S8/NF nanowires by electrodeposition to obtain a-MoSX@Ni9S8/NF nanoflower rods. A low overpotential of 138 mV (@10 mV cm−2) at room temperature was achieved for a-MoSX@Ni9S8/NF with a high electrochemically active surface area. An external thermal field could reduce the interfacial charge transfer resistance between the electrode and the electrolyte and promote the electrochemical hydrogen evolution reaction (HER). The a-MoSX@Ni9S8/NF showed excellent hydrogen precipitation performance of 72 mV (@10 mV cm−2) under 80 °C. The a-MoSX@Ni9S8/NF owned good reproducibility and durability after 5000 cycles in acidic media. The Faraday efficiency of the composite can reach 92.6%. This work provided a meaningful perspective on the design of electrochemical HER catalysts and external field assisted HER.