TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The catalyst comprises Pt nanoparticles positioned in the Pt nanowire and supported on the carbon-based material; and a supporting aid, which is a compound including an element from silicon, zirconium, aluminum, and/or titanium. The carbon-based material is a vapor grown carbon fiber, a carbon nanohorn, a carbon nanoring, a carbon nanowire, a carbon nanorod, preferably a carbon nanotube. The catalyst metal precursor is hexachloroplatinum hydride (H2PtCl6), platinum chloride (PtCl2), platinum bromide (PtBr2), diammine platinum di(nitrite) ((NH3)2Pt(NO2)2), potassium chloroplatinate (K2PtCl6), (K2PtCl4), potassium platinocyanide (K2(Pt(CN)4)3H2O), K2Pt(NO2)4, sodium platinum chloride (Na2PtCl6), Na2(Pt(OH)6), platinum acetylacetonate, and/or ammonium tetrachloroplatinate. Preferred Parameter: The Pt nanowire has an average diameter of 1.5-10 nm and a length of 3 nm-10 microns. The Pt nano-particles have an average particle size of 2-8 nm. The Pt nanowire and Pt nano-particles are included in a weight ratio of 10:90-90:10. The carbon-based material has an aspect ratio of greater than or equal to1. The carbon-based material and the catalyst metal precursor are mixed in a weight ratio of 60:40-90:10. The supporting aid is mixed in 2-6 times as much as the weight of the platinum. Preferred Composition: The Pt nanowire is supported on the carbon-based material in 5-90 wt.%, based on the total weight of the catalyst. The supporting aid is included in less than or equal to5 wt.%, based on the total weight of the catalyst. Preferred Method: Preparation of the carbon-based material comprises acid-treating the carbon-based material by using an acid, washing the carbon-based material, and heat-treating the carbon-based material to remove the acid. The method comprises mixing the carbon-based material and supporting aid before the addition of the catalyst metal precursor solution. The supporting aid is mixed with the carbon-based material in an organic solvent and/or water; and after mixing, the mixture is dried and powdered. The method comprises eluting the supporting aid after heat-treatment to decrease the amount of the supporting aid remaining in the catalyst to less than or equal to5 wt.%, where heat-treatment is performed at less than or equal to250degreesC. EXAMPLE - Carbon nanotube (5 g) was put in a 60% nitric acid solution. The mixture was agitated at room temperature for 5 hours, and washed with distilled water. Then, it was filtered and heat-treated at 400degreesC for 5 hours to remove nitric acid remaining in the carbon nanotube. The pre-treated carbon nanotube (5 pbw) was mixed with fumed silica (surface area: 380 m2/g) (95 pbw). Then, the resulting mixture was mixed with a solvent of n-propylalcohol, isopropylalcohol, and water, which was mixed in a volume ratio of 1:1:1. The mixture was dried, and ground with to prepare a powder-shaped support. Next, H2PtCl6 solution (20 pbw) was added to support (80 pbw) in a dropwise fashion to prepare a catalyst precursor supported on the support. The catalyst precursor supported on the support was treated with an ultrasound, and then dried. The dried product was ground, and heat-treated at 200degreesC for 5 hours under a hydrogen atmosphere. Then, it was treated with HF to remove fumed silica used as a supporting aid, preparing a Pt nanowire catalyst for a fuel cell supported on carbon nanotube. The prepared catalyst included 80 wt.% of Pt nanowire and Pt nano-particles based on the entire catalyst weight. The Pt nanowire was included in the catalyst at 30-40 wt.% more than the Pt nano-particles.