▎ 摘　　要

NOVELTY - Composite material of cobalt-boron-phosphorus-oxide (Co-B-P-O) nano-particles supporting reduced graphene oxide obtained by loading Co-B-P-O on the reduced graphene oxide by a chemical in-situ reduction method by improved Hummers method to obtain material with specific surface area of 62-120 m2/g, and pore size distribution of 12-14 nm, is claimed. USE - The material is useful as sodium borohydride hydrolysis catalyst (claimed). ADVANTAGE - The material has high catalytic performance, high cycleperformance, simple process and short reaction period. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the material, comprising (i) adding concentrated sulfuric acid, sodium nitrate, flake graphite and potassium permanganate into water under specific conditions to water to obtain a mixed solution, allowing the mixed solution react under specific conditions, dropping hydrogen peroxide to the mixed solution to react the excess potassium permanganate under specific conditions, repeatedly centrifuging the mixed solution, washing with hydrochloric acid and washing with deionized water until the pH of the solution is 7 to obtain the graphene oxide solution and freeze-drying to obtain the graphene oxide nanosheet carrier which is denoted as GO, and (ii) using cobalt chloride hexahydrate, sodium hypophosphite monohydrate, sodium borohydride and the graphene oxide nanosheet carrier to prepare raw materials, uniformly mixing the graphene oxide nanosheet carrier and purified water with a mass ratio of 1:1 under ultrasonic conditions to obtain the graphene oxide dispersion, and configuring the sodium borohydride into a sodium borohydride solution with a mass fraction of 5-6 wt.%, adding cobalt chloride hexahydrate and sodium hypophosphite monohydrate into the graphene oxide dispersion liquid for dissolution under stirring conditions to obtain a reaction liquid, dropping sodium borohydride solution to the reaction solution under specific conditions, washing, filtering, and drying the reaction product to obtain material, which is denoted as Co-B-P-O/rGO; and (2) use of material as a sodium borohydride hydrolysis catalyst, where the maximum hydrogen desorption rate provided at 298 K reaches to 9036.3 ml/minute/g, the hydrogen desorption amount is 100% of the theoretical value, and the activation energy of catalytic hydrogen desorption is Ea=28.64 kJ/mol, which retains 88.9% of its initial catalytic activity for sodium borohydride hydrolysis after 10 cycles of use.