▎ 摘　　要

NOVELTY - A bifunctional tungsten-cobalt bimetallic water electrolysis catalyst comprises tungsten, cobalt and sulfur in the form of sulfide, and is wrapped in graphene and loaded on carbon paper. The catalyst comprises carbon paper-doped tungsten-cobalt-sulfur (I). USE - Bifunctional tungsten-cobalt bimetallic water electrolysis catalyst used for hydrogen evolution and oxygen evolution reaction. ADVANTAGE - The bifunctional tungsten-cobalt bimetallic water electrolysis catalyst has high electrocatalytic activity, efficiency, stability, and is economical, long-lasting and environmentally-friendly DETAILED DESCRIPTION - A bifunctional tungsten-cobalt bimetallic water electrolysis catalyst comprises tungsten, cobalt and sulfur in the form of sulfide, and is wrapped in graphene and loaded on carbon paper. The catalyst comprises carbon paper-doped tungsten-cobalt-sulfur of formula: WxCoySz (I), where x/y and z are 0-10 (including 10). An INDEPENDENT CLAIM is included for preparation of the bifunctional tungsten-cobalt bimetallic water electrolysis catalyst, which involves adding cobalt tungstate to the mixed solution comprising hydrogen peroxide and hydrochloric acid, stirring uniformly to obtain mixed slurry comprising tungsten and cobalt material, soaking carbon paper in ultrapure water and ethanol, ultrasonically-cleaning for 3-8 minutes, drying to obtain treated carbon paper, immersing the treated carbon paper in a mixed slurry comprising tungsten and cobalt, calcining at a temperature of 300-600degrees Celsius for 10-40 minutes to obtain carbon paper loaded with seed crystals of tungsten and cobalt oxide, putting the carbon paper loaded with seed crystals of tungsten and cobalt oxide into a tube furnace, passing the carbon disulfide solution under the protection of argon or nitrogen, treating at a temperature of 600-1000degrees Celsius for 0.5-3 hour, and cooling to room temperature. The ratio of cobalt tungstate, hydrogen peroxide and hydrochloric acid is 1-20 mmol:5-15 mL:10-20 mL.