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 (a) nano-powder(s) of one or more metal oxides, agitating the obtained mixture, adding pre-shaped alumina support pellets to the agitated mixture, cooling the mixture and combining it with an aqueous solution of sodium nitrate (NaNO3) and/or potassium nitrate (KNO3), 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 non-conductive metal oxide support. The supported ruthenium-containing catalyst is useful for decomposing ammonia (NH3) into nitrogen gas (N2) and hydrogen gas (H2). The hydrogen is used in a fuel cell (all claimed).    ADVANTAGE - The method is simpler, and provides less energy and time consuming than the method of the prior art, while still yielding a good catalytic activity. The catalysts prepared by the method show a good to very good catalytic activity, in particular when compared to a commercial 2% ruthenium/Al2O3 catalyst.    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 (a) nano-powder(s) of one or more metal oxides in a ratio of moles metal oxide(s) to moles ruthenium atoms in the one or more ruthenium precursor compounds of about 0:1 to about 6:1, the metal oxide nano-powder(s) having a surface area of from about 5 to about 300 m2/g and a point of zero charge (PZC) of pH of 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 about 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 (NaNO3) and/or potassium nitrate (KNO3), agitating the resultant mixture, separating the solvent and the solids, and drying the obtained solid pellets of alumina, or alumina and the metal oxide(s) of the nano-powder(s) coated with ruthenium and an additional amount sodium (Na) and/or potassium (K) ions. An INDEPENDENT CLAIM is a supported ruthenium-containing catalyst, obtainable by the method.