TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the method carrying out purification process for carbon carrier by using non-oxidizing acid aqueous solution of carbon support, carrying out removing impurities, where process temperature is 60-80 degrees C, time is 2-8 hours and non-oxidizing acid is 0.1-2 M hydrochloric acid or nitric acid. In preparing core-shell structure of nanoseed colloidal solution of formula (I) atomic ratio of: transition metal M and platinum is 5:1-30:1; platinum and gold element is 500:1-50:1. The molar ratio of complexing agent and sum of platinum and gold is 0:1-20:1. The transition metal M nanoseed colloidal solution is prepared by dissolving transition metal M precursor in an alcohol solvent uniformly, dissolving protective agent in alcohol solution transition metal M precursor, under inert gas protection, adding 0.1-0.5 M reducing agent aqueous solution, where addition rate is 0.05-0.5 ml/second, determining molar ratio of reducing agent and transition metal ions according to the stoichiometry of the reaction and reaction time is 1-5 hours. The inert gas flow rate is 10-100 ml/minute. Preferred Components: The platinum precursor is chloroplatinic acid, platinum (IV) chloride, potassium hexachloroplatinate, sodium hexachloroplatinate or potassium tetrachloroplatinate. The concentration of platinum element in aqueous solution is 5-50 mM. The gold precursor is gold (III) chloride, gold (III) acetate, chloroauric acid, gold (III) sodium chloride or potassium gold (III) chloride. The concentration of gold element in aqueous solution is 2-20 mM. The transitional metal M is manganese, iron, cobalt, nickel, copper or zinc. The complexing agent is sodium bromide, potassium bromide or hexadecyl trimethyl ammonium bromide. The inert atmosphere in heat treatment is mixture of hydrogen gas and inert gas in 1:1-1:10 ratio. The inert gas is argon, nitrogen or helium. The carbon carrier is activated carbon vulcan XC-72, KB300, KB600 or BP2000. The transition metal M precursor is chloride of metal M, nitrate or acetate. The alcohol solvent is ethylene glycol, propylene glycol or glycerol. The protective agent is trisodium citrate or disodium ethylenediaminetetraacetate chelating agent or hexadecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium bromide, sodium dodecyl benzene sulfonate surface active agent. The concentration of transition metal ion in alcoholic solution is 10-100 mM. The molar ratio of protective agent and transition metal ion is 0.5:1-5:1. The reducing agent is borohydride or formaldehyde.