NOVELTY - Graphene-loaded bimetallic nanoparticles comprise (in parts by wt.): (i) ethanol aqueous solution (40) with a volume ratio of 1:1; (ii) graphene oxide (10); (iii) bimetal nano-particles comprising e.g. cobalt-gold bimetal containing cobalt nitrate hexahydrate (0.4-9) and chloroauric acid (1.17-4.17), or nickel-silver bimetal containing nickel nitrate hexahydrate (0.7-10.29) and silver nitrate (0.67-3.71); (iv) sodium borohydride (1-121); (v) an anionic surfactant (30-100); and (vi) a macromolecular dispersing agent (50-150).    USE - The graphene-loaded bimetallic nanoparticles are useful for methanol/ethanol fuel cells, formic acid fuel cells and organic catalytic reactions.    ADVANTAGE - The graphene-loaded bimetallic nanoparticles: utilize cost-effective gold and silver, preferably non-noble metals, i.e., cobalt and nickel as compared to that of noble metals e.g. platinum and ruthenium, and hence are economical; effectively overcome the problem of formation of intermediate carbon monoxide, which causes catalyst poisoning under an acidic condition, and reduces the catalytic activity; and can be directly applied to the methanol/ethanol fuel cells, formic acid fuel cells and organic catalytic reactions.    DETAILED DESCRIPTION - Graphene-loaded bimetallic nanoparticles comprise (in parts by wt.): (i) ethanol aqueous solution (40) with a volume ratio of 1:1; (ii) graphene oxide (10); (iii) bimetal nano-particles comprising cobalt-gold bimetal containing cobalt nitrate hexahydrate (0.4-9) and chloroauric acid (1.17-4.17), or nickel-silver bimetal containing nickel nitrate hexahydrate (0.7-10.29) and silver nitrate (0.67-3.71), or cobalt-silver bimetal containing cobalt nitrate hexahydrate (0.7-10.27) and silver nitrate (0.67-3.72); (iv) sodium borohydride (1-121); (v) an anionic surfactant (30-100); and (vi) a macromolecular dispersing agent (50-150). An INDEPENDENT CLAIM is also included for preparing the graphene-loaded bimetallic nano-particles by sodium borohydride reduction method, comprising: sequentially adding graphene oxide, the macromolecular dispersing agent and the anionic surfactant into a water-ethanol mixed solution according to the weighed proportion, stirring for 0.5-1 hour, adding into the bimetallic nano-particles, adding into sodium borohydride, stirring for 1-12 hours to obtain a black precipitate of graphene-loaded bimetallic nanoparticles, then treating the obtained black precipitate by centrifugally separating the precipitate by using a centrifuge, repeatedly cleaning the precipitate by using secondary de-ionized water and ethanol for removing unreacted reactants, and vacuum drying the precipitate for 12 hours at 60 degrees C.