NOVELTY - Preparing a ruthenium-containing catalyst on a non-conductive metal oxide support, comprises dissolving one or more ruthenium precursor compounds in an liquid organic polyol, combining the obtained solution with nano-powder, agitating the obtained mixture, adding pre-shaped alumina support pellets to the agitated mixture, cooling the mixture, agitating the resultant mixture, separating the solvent and the solids, and drying the obtained solid pellets.    USE - The method is useful for preparing ruthenium-containing catalyst on a non-conductive metal oxide support, where the catalyst is useful for decomposing ammonia into nitrogen and hydrogen, which is useful in a fuel cell (all claimed).    ADVANTAGE - The method is capable of simply and rapidly preparing ruthenium-containing catalyst with good catalytic activity and less energy consumption.    DETAILED DESCRIPTION - Preparing a ruthenium-containing catalyst on a non-conductive metal oxide support, comprises dissolving one or more ruthenium precursor compounds in an liquid organic polyol, combining the obtained solution with nano-powder of one or more metal oxides in a ratio of moles of metal oxide to moles of ruthenium atoms in the ruthenium precursor compounds of 0:1-6:1, where the metal oxide nano-powder has a surface area of 5-300 m2/g and a point of zero charge of pH 5.5 or higher, agitating the obtained mixture, adding pre-shaped alumina support pellets to the agitated mixture, which is than heated at a temperature of 50 degrees C to the boiling point of the organic polyol, until the reaction is finished, cooling the mixture and combining it with an aqueous solution of sodium nitrate and/or potassium nitrate, agitating the resultant mixture, separating the solvent and the solids, and drying the obtained solid pellets of alumina, or alumina and the metal oxide of the nano-powder coated with ruthenium and an additional amount sodium and/or potassium ions. An INDEPENDENT CLAIM is included for the supported ruthenium-containing catalyst obtainable by the method.