▎ 摘　　要

NOVELTY - A ruthenium-doped tungsten nitride particle nitrogen-doped graphene tube hydrogen evolution electrocatalyst comprises nitrogen-doped graphene tubes and ruthenium-doped tungsten nitride nanoparticles on the surface, in-situ obtained by hydrothermal and nitriding method. The electrocatalyst is obtained by preparing 0.72 mmol/l ammonium tungstate aqueous solution and 4.8-28.4 mmol/l ruthenium trichloride aqueous solution, mixing the two solutions in a volume ratio of 5:1, transferring to a reaction kettle, soaking nitrogen-doped graphene tubes grown on graphite in the reaction kettle, hydrothermally reacting at 200℃ for 2 hours, washing, drying to obtain ruthenium-doped tungsten oxide precursor loaded on the nitrogen-doped graphene tubes, placing the product in a tubular furnace, heating in argon gas atmosphere, closing the argon gas, introducing ammonia gas for certain time, and cooling to room temperature. USE - Ruthenium-doped tungsten nitride particle nitrogen-doped graphene tube hydrogen evolution electrocatalyst. ADVANTAGE - The electrocatalyst shows excellent hydrogen evolution performance in an alkaline medium, and stability, and has an over-potential of 38 mV at a current density of 10mA/cm2, a Tafel slope of 43mV/dec, and no obvious change in current density when kept at 10 mA/cm2for 28 hours. DETAILED DESCRIPTION - A ruthenium-doped tungsten nitride (W4.6N4) particle nitrogen-doped graphene tube hydrogen evolution electrocatalyst comprises nitrogen-doped graphene tubes and ruthenium-doped tungsten nitride nanoparticles on the surface, in-situ obtained by hydrothermal and nitriding method. The electrocatalyst is obtained by preparing 0.72 mmol/l ammonium tungstate aqueous solution and 4.8-28.4 mmol/l ruthenium trichloride aqueous solution, mixing the two solutions in a volume ratio of 5:1, transferring to a reaction kettle, soaking nitrogen-doped graphene tubes grown on graphite in the reaction kettle, hydrothermally reacting at 200℃ for 2 hours, washing, drying to obtain ruthenium-doped tungsten oxide (WOx) precursor loaded on the nitrogen-doped graphene tubes, placing the product in a tubular furnace, heating in argon gas atmosphere, closing the argon gas, introducing ammonia gas for certain time, and cooling to room temperature.