TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Catalyst: The acid treated second catalyst metal particles cover 0.01 to 50% of the surface of the acid treated first catalyst metal particles. The supported catalyst (c1) comprises (wt.%): second catalyst metal particles (0.01 to 5); or first and second catalyst metal particles together (50 to 80), based on the supported catalyst. The decomposition temperature of the supported catalyst is 400 to 600degreesC. The surface area of the graphite based catalyst carrier is 250 to 1200 m2/gm; and the average particle size of the graphite based catalyst carrier is 10 to 300 nm. Preferred Components: The amount of the first catalyst metal particles is at least 30 wt.% based on the supported catalyst. The average size of the first catalyst metal particles is 2 to 6 nm; and the average size of the second catalyst metal particles is 2 to 4 nm. The graphite based catalyst carrier is at least one material selected from carbon black, ketjen black (KB), acetylene black, active carbon powder, carbon molecular sieve, carbon nanotubes, active carbon powder having micro pores, and mesoporous carbon. Preferred Method: In method (m1), the adding of the second catalyst metal precursor solution to the mixture of the first catalyst metal precursor solution and the graphite based catalyst carrier solution, the titrating the pH, and the heating and cooling of the resulting mixture are performed at least once. The amount of the first catalyst metal precursor is in the range of 0.2 to 0.8 wt.parts based on 100 parts by weight of the mixture of the first catalyst metal precursor solution and the graphite based catalyst carrier solution. The amount of the polyols in the first and second catalyst metal precursor solutions is in the range of 105 to 2x105 wt.parts based on 100 parts by weight of the first and second catalyst metal precursors, respectively. The amount of water in the graphite based catalyst carrier solution is in the range of 40 to 60 wy.parts based on 100 parts by weight of the mixture of the first catalyst metal precursor solution and the graphite based catalyst carrier solution. The pH is titrated in the range of 9 to 13. The mixture and the resulting mixture are heated to 90 to 115degreesC; and the temperature is increased at a rate of 1.5 to 3.5degreesC/minute. The amount of the second catalyst metal precursor is in the range of 0.01 to 0.5 wt.parts based on 100 parts by weight of the polyol. In method (m2), the first-step polyol process includes preparing a platinum precursor solution; preparing a graphite based catalyst carrier dispersed solution; mixing the platinum precursor solution and the graphite based catalyst carrier dispersed solution, titrating the pH of the resulting mixture, and heating and cooling the resulting mixture; and filtrating, cleaning, and drying the resulting mixture. The second-step polyol process includes mixing the resulting mixture with a second catalyst metal precursor solution forming a resulting compound, and titrating the pH of the resulting compound, and heating, and cooling the resulting compound.    TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The first catalyst metal particles are formed of a metal selected from platinum, gold, ruthenium, osmium, palladium, platinum-ruthenium alloy, platinum-osmium alloy, and platinum-palladium alloy. The second catalyst metal particles are formed of a metal selected from cobalt, nickel, copper, zinc, vanadium, chrome, manganese, iron, and titanium. The second catalyst metal precursor is formed of a material selected from iron (Fe), nickel (Ni), palladium (Pd), and tin (Sn).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The polyol is formed of ethylene glycol, diethylene glycol and/or triethylene glycol. EXAMPLE - A first catalyst metal precursor dihydrogen hexachloroplatinate-monohydrate (H2PtCl6.H2O) (0.96 gm) was dissolved in ethylene glycol (2 gm) to prepare a first catalyst metal precursor solution. TIMREX HSAG (RTM: carbon) (0.25 gm) was injected in a mixture of ethylene glycol (105 gm) and water (20 gm). The mixed solution was sonicated for 20 minutes. The first catalyst metal precursor solution and the mixed solution were mixed, and the resulting mixture was stirred for 10 minutes. The pH of the resulting mixture was titrated to 11 using a 1M potassium hydroxide solution, and then the resulting mixture was stirred again for 10 minutes. The temperature of the resulting mixture was increased from 25 to 120degreesC for 35 minutes at a rate of 2.71degreesC/minute, and maintained at 120degreesC for 1 hour. The temperature of the resulting mixture was then cooled down to 25degreesC. A second catalyst precursor cobalt chloride-hexahydrate (CoCl2.6H2O) (0.2 gm) was mixed with the resulting mixture above. The pH titration, heating and cooling of the resulted compound was repeated. Accordingly, the resulting compound was cleaned 3-4 times using a centrifuge. Then, the resulting compound was dried in a freezing drier to prepare a supported catalyst 56 wt.% platinum/2 wt % cobalt/carbon catalyst having a particle size of 5.6 nm.