▎ 摘　　要

NOVELTY - Platinum-nickel-SNT/graphene hydrogen evolution catalyst comprises graphene which is used as conductive carrier, nickel-SNT is confined silicate nanotube medium, and platinum nanoparticles are active metals. The platinum nanoparticles are filled in wall of the nickel-SNT tube. The content of platinum nanoparticles is 1-8 wt.% based on the catalyst. USE - Platinum-nickel-SNT/graphene hydrogen evolution catalyst. ADVANTAGE - The platinum-nickel-SNT/graphene hydrogen evolution catalyst has greater economic and social value, prevents the growth and loss of platinum nanoparticles, greatly improves dispersibility, hydrogen evolution activity of the catalyst, overpotential is 167mV at current density of 10mA/cm2. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing platinum-nickel-SNT/graphene hydrogen evolution catalyst, which involves: (A) dissolving appropriate amount of soluble nickel salt in deionized water, and adding excess ammonia solution dropwise, forming precipitate, precipitate gradually dissolving under magnetic stirring, adding 0.1-0.5 mol/l sodium silicon oxide solution dropwise to form precipitate, molar ratio of nickel to silicon is 0.05-0.4, adding small amount of polyvinylpyrrolidone, continuing to stir for 0.5-3 hours, transferring resulting mixture into hydrothermal reactor lined with polytetrafluoroethylene, and reacting at 150-220 degrees C for 8-48 hours, naturally cooling to room temperature, centrifuging, washing with deionized water and ethanol multiple times, drying at 150-200 degrees C, and roasting at 350-500 degrees C to obtain nickel-SNT, dispersing obtained nickel-SNT in appropriate amount of ethanol, and adding 0.1-0.4M chloroplatinic acid solution, molar ratio of platinum to nickel is 1:5-5:1, ultrasonic for 1-3 hours, filling chloroplatinic acid in wall of the nickel-SNT silicate nanotube, adding 1-10g/l graphene oxide dispersion, continuing to sonicate for 0.5-2 hours, and transferring the resulting mixture into hydrothermal reactor, lining with polytetrafluoroethylene, reacting at 100-180 degrees C for 2-8 hours, naturally cooling to room temperature, centrifugeing, washing with deionized water and ethanol multiple times; and (B) drying at 150-200 degrees C to obtain final product.