▎ 摘　　要

NOVELTY - The method involves (i) dispersing the carbon carrier and the hetero atom-containing compound in a solvent, ultrasonicating to obtain a uniform dispersion, evaporating the solvent to obtain the solid product and grinding, where the heteroatom in the heteroatom ontaining compound is nitrogen, sulfur or phosphorous; (ii) reacting the solid product in the inert gas and grinding to obtain heteroatom modified carbon carrier; (iii) dispersing the heteroatom modified carbon carrier in the solvent, ultrasonicating, adding the ruthenium metal salt precursor, molybdenum metal salt precursor, palladium metal salt precursor into the dispersion, ultrasonicating, stirring, adding reducing agent, reacting, filtering, washing, drying and grinding to obtain the heteroatom modified carbon supported ruthenium based ternary alloy nano particle electro catalyst; and (iv) reacting the electro catalyst in the inert electrocatalyst or reducing atmosphere, cooling and grinding to obtain the electrocatalyst. USE - The method for preparing heteroatom modified carbon supported ruthenium-molybdenum-palladium nano catalyst is used in an anode side hydrogen oxidation reaction in an alkaline fuel cell (claimed). ADVANTAGE - The nano-crystal obtained by the method has low cost, small particles, excellent size uniformity and dispersibility, and has high electrochemical activity specific surface area and intrinsic activity, and good carbon monoxide toxicity resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a heteroatom modified carbon supported ruthenium-based ternary alloy nano electro catalyst, is prepared as mentioned above.