Abstract: Developing highly active and low cost hydrogen evolution electrocatalysts is an imminent task to improve the efficiency of water electrolysis hydrogen production, achieve large-scale hydrogen production, and promote the development and utilization of hydrogen energy. Molybdenum disulfide (MoS₂) has shown a certain potential in the field of hydrogen evolution catalysis, and its modification to improve the catalytic activity and replace the platinum-based catalyst has become a research hotspot in recent years. A simple one-step solvothermal method was used to successfully synthesize a Ni-doped electrocatalytic hydrogen evolution (HER) catalyst Ni@MoS₂, which had excellent electrocatalytic hydrogen evolution activity and good stability. The 20Ni@MoS₂ as prepared at 240 ℃ exhibited better HER performance with a low overpotential of 190 mV at 10 mA/cm² and Tafel slope of 162 mV/dec in acidic medium.