▎ 摘　　要

NOVELTY - Preparing fiber silk-graphene-platinum ternary composite catalyst comprises (a) adding Acetobacter to the coconut water, and culturing to produce filaments, (2) preparing a mixed solution containing graphene oxide and chloroplatinic acid, (3) dropping the mixed solution into the product, continue to cultivate, so that graphene oxide and chloroplatinic acid are mixed into the filaments, (4) heating the mixture, reducing graphene oxide to graphene, and graphene is loaded on the filament, at the same time, the metal platinum formed by the reduction of chloroplatinic acid, and immobilizing metal platinum on graphene to obtain a fibersilk-graphene-platinum ternary composite catalyst. USE - The method is useful for preparing fiber silk-graphene-platinum ternary composite catalyst. ADVANTAGE - The method: uses coconut juice to realize oxidation and graphene and platinum immobilization; avoids using toxic, harmful, expensive chemical reduction agent and does not need to use organic solvent, stabilizer and surface-active agent ; is simple, has mild reaction condition, green, and economical.