▎ 摘　　要

NOVELTY - Preparation of a platinum tin graphene catalyst includes mixing 0.1 plus minus 0.001 g graphene oxide and 40 plus minus 0.001 mL ethanediol in a flask, adding 2 plus minus 0.001 mL hexachloroplatinic acid ethanediol solution, adding 2 plus minus 0.001 mL stannous chloride ethanediol solution, dropping sodium hydroxide ethanediol solution while stirring, and adjusting the pH value to 9-10; ultrasonic dispersing; centrifuging and separating at 5000 evolutions/minutes (rpm) for 10 minutes; washing the precipitate with 200 mL deionized water; suction filtering; vacuum drying at 25 degrees C; grinding and sieving; and storing at 20 plus minus 2 degrees C. USE - Method for the preparation of a platinum tin graphene catalyst (claimed). ADVANTAGE - The method has accurate steps, and is environment-friendly. DETAILED DESCRIPTION - Preparation of a platinum tin graphene catalyst comprises: (A) refining 99% of 0.1 plus minus 0.001 g solid state graphene oxide, 99.8% of 50 plus minus 1 mL liquid state ethanediol, 99.8% of 10 plus minus 1 g solid state hexachloroplatinic acid, 98% of 10 plus minus 1 g solid state stannous chloride, 99.5% of 1 plus minus 0.001 g solid state sodium hydroxide, 99.5% of 5000 plus minus 50 mL liquid state deionized water, 99.7% of 5000 plus minus 50 mL liquid state absolute ethanol, and 99% of 10000 plus minus 100 cm3 gas state argon; (B) stirring and mixing 1 plus minus 0.001 g sodium hydroxide and 10 plus minus 0.001 mL ethanediol in a flask for 5 minutes to obtain 2.5 mol/L sodium hydroxide-ethanediol solution; (C) stirring and mixing 1 plus minus 0.01 g hexachloroplatinic acid and 38.62 plus minus 0.001 mL ethanediol in a the flask for 5 minutes to obtain 0.05 mol/L hexachloroplatinic acid ethanediol solution; (D) stirring and mixing 1 plus minus 0.001 g stannous chloride and 88.63 plus minus 0.001 mL ethanediol in a flask for 5 minutes to obtain 0.05 mol/L stannous chloride ethanediol solution; (E) mixing 0.1 plus minus 0.001 g graphene oxide and 40 plus minus 0.001 mL ethanediol in a flask, adding 2 plus minus 0.001 mL hexachloroplatinic acid ethanediol solution, adding 2 plus minus 0.001 mL stannous chloride ethanediol solution, stirring and mixing for 5 minutes, dropping sodium hydroxide ethanediol solution at 0.4 mL/minutes in the flask while stirring, and adjusting the pH value to 9-10; ultrasonic dispersing for 180 minutes; magnetic stirring, successively inserting in an argon tube, dropping funnel, and a water cycle condenser pipe from left to right at the upper part of the three-necked flask, starting the argon tube, inputting argon into the three-necked flask with an inputting speed of 20 cm3/minute, starting the stirring magnetron and heater, setting the temperature at 130 degrees C, heating, constant temperature stirring for 180 minutes, continuously filling into argon, and stirring and cooling to 25 degrees C to obtain a mixed solution; chemical reacting the mixed solution in the three-necked flask by warming, heating, stirring and mixing, and reacting; centrifuging and separating at 5000 rpm for 10 minutes, retaining precipitate, and discarding supernatant; washing the precipitate with 200 mL deionized water, centrifugal separating for 10 minutes at 5000 rpm, discarding supernatant, retaining the precipitate, and repeatedly washing twice; washing precipitate with 200 mL absolute ethanol, stirring for 2 minutes by a glass bar, centrifugal separating for 10 minutes at 5000 rpm, discarding supernatant, retaining precipitate, and repeatedly washing twice; suction filtering the precipitate on a Buchner funnel; vacuum drying at 25 degrees C and - 0.09MPa for 18 hours to obtain a platinum tin graphene powder; and grinding using agate mortar and a pestle, and sieving by a 600 meshes sieve; (F) detecting by a scanning electron microscope, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray diffractometer, X-ray photoelectron spectroscopy, and electrochemical workstation; analyzing; and characterizing the appearance, color, ingredient, chemical physic properties, and mechanical property; and (G) storing in a brown transparent glass container in a cool, clean, and dry environment at 20 plus minus 2 degrees C with a relative moisture is less than or equal to 10%.