TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (claimed): Preparation of the methanol oxidation catalyst involves keeping a conductive support at less than or equal to 400 degrees C; and depositing structural metal elements to the conductive support by sputtering method or vapor deposition method to form the nanoparticles. Preferred Catalyst: The catalyst contains at least one selected from Sn, Hf and Ni in an amount of 0.5-30 at.%. The catalyst additionally comprises oxygen ( less than or equal to 25 at.%); and conductive support carrying the nanoparticles.z= less than or equal to 30 at.%;y=0 at.%;u=1-15 at.%.A part of the Pt is substituted with noble metal selected from at least one of Rh, Os, Ir, Pd, Ag or Au. Preferred Components: The nanoparticles have an average particle diameter of less than or equal to 10 nm or greater than or equal to 0.5. The conductive support is selected from carbon material and conductive ceramics material. The carbon material has fiber-form, tube-form or coil-form. Preferred Method: The method additionally involves washing the nanoparticles with an acid or an alkali; and subjecting the nanoparticles to after-heat treatment. The after-heat treatment is carried out at 10-400 degrees C and an oxygen partial pressure of less than 5%. The sputtering method or vapor deposition method allows other materials to deposit to the conductive support. A dissolvable metal is deposited together with the structural metal elements to the conductive support by the sputtering method or vapor deposition method, where the method additionally involves washing with an acid to remove the dissolvable metal. EXAMPLE - Vulcan XC72 (RTM: carbon black support having specific surface area of 230 m2/g) was dispersed and received in a holder. This holder was disposed in a chamber of an ion beam sputtering apparatus and then the chamber was evacuated. After the vacuum degree in the chamber reached 3x 10-6 Torr. Ar gas was introduced into the chamber. Catalyst particles were deposited to a support by carrying out sputtering using a predetermined target such that the catalyst particles that had composition of Pt70V15Nb15. As the target, any of a metal target or an alloy target was used. The support to which the catalyst particles were deposited was subjected to acid washing treatment using an aqueous acid solution which was prepared by adding sulfuric acid (10 g) to water (200 g). Further, after the support was washed with water, it was dried to obtain corresponding methanol oxidation catalyst. The unit cell obtained by using the catalyst had voltage of 0.48 V and rate of deterioration of 6% indicating high stability while maintaining high activity.