TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method comprises: depositing the platinum comprising depositing a portion of a total amount of platinum on the carbon support material, followed by depositing the first alloy metal, depositing remainder of the total amount of the platinum on the carbon support material, and depositing the second alloy metal; depositing the platinum comprises depositing 25% of a total amount of platinum on the carbon support material, followed by depositing the first alloy metal, and depositing a remainder of the total amount of the platinum on the carbon support material; or depositing the platinum, depositing the first alloy metal, and depositing the second alloy metal comprising reducing the platinum, first alloy metal, and second alloy metal from an ionic state using a reducing agent (hydrazine, sodium borohydrate, formic acid or formaldehyde), or vacuum reduction; calcining the deposited platinum, first alloy metal and second alloy metal at 600-1000 degrees C (1112-1832 degrees F) for a predetermined amount of time; depositing platinum (20-60 mol.%), depositing first alloy metal (5-30 mol.%), and depositing second alloy metal (20-50 mol.%) to form the catalytic alloy; establishing a combined wt.% of the platinum, the first alloy metal, and the second alloy metal that is 20-60 wt.% of a total weight of the supported catalyst; establishing an average particle size of the catalytic alloy that is 30-90 Angstrom (300-900 nm), (preferably less than 60 Angstrom (600 nm)), or crystallographic lattice constant of the catalytic alloy that is 3.78-3.83 Angstrom (37.8-38.3 nm), (preferably 3.74-3.86 Angstrom (37.4-38.6 nm)). Preferred Components: The first or second row transitional metal element is titanium, manganese, cobalt, vanadium, chromium, nickel, copper, zirconium and/or iron. The first alloy metal is the iridium and the second alloy metal is the cobalt. EXAMPLE - High surface area carbon support (ketjen black) was dispersed in water with sodium bicarbonate and heated to boiling. Chloroplatinic acid (CPA) and diluted solution of formaldehyde was added, and filtered the carbon supported platinum catalyst dispersion and dried. Then the solution was redispersed in water and iridium chloride was added. Formaldehyde was added to hot solution and the pH of the solution was maintained between 5.5-6 by using ammonium hydroxide or acetic acid. Then solid catalyst was collected, rinsed with water and remaining CPA was added to give platinum-iridium-carbon. Then the platinum-iridium-carbon was dispersed in water and cobalt nitrate was added. The reaction mixture was dried in vacuum and heat treated in tube furnace to 923 degrees C to give platinum-iridium-cobalt catalyst.