TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: In step (a), ethanol in an amount of 800-6400-fold of the total weight of the metal ions is used, and in step (b) the sodium acetate powder in an amount of 5-40-fold of the total weight of the metal ions is used, or ammonia solution containing ammonia in an amount of 0.3-4-fold of the total weight of the metal ions is used. The platinum raw material is platinum tetrachloride, potassium tetrachloroplatinate, hexachloroplatinic acid hydrate (H2PtCl6.xH2O), platinum(II) chloride, platinum(II) bromide or platinum oxide. The platinum raw material contains 5-90 wt.% of platinum, based on the total weight of carbon material. The transition-metal raw material is nickel, cobalt, iron, chromium, copper, ruthenium, palladium, tin, vanadium, molybdenum, tungsten or iridium, preferably nickel chloride hexahydrate, cobalt chloride hexahydrate, nickelbromide, nickelchloride, ruthenium(III) chloride, cobalt chloride, iron(II) chloride, iron(III) chloride, ferric chloride tetrahydrate, ferric chloride hexahydrate, chromium(III) chloride, chromium(II) chloride, chromium(III) chloride hexahydrate, copper bromide, copper chloride, copper chloride dihydrate, palladium(II) chloride, palladium(III) chloride, tin(II) chloride, tin bromide, tin(IV) chloride, tin(II) chloride dihydrate, molybdenum(II) chloride, molybdenum(III) chloride, tungsten(IV) chloride, tungsten(VI) chloride, iridium(III) chloride or hydrated iridium(III) chloride (IrCl3.xH2O). The transition-metal raw material contains 5-60 wt.% of transition-metal, based on the total weight of the platinum.x = not defined.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The ethanol is water-free ethanol with a water content of less than or equal to 1%. The carbon material is carbon powder, carbon black, acetylene black, ketjen black, activated carbon, carbon nanotubes, carbon nanofibers, carbon nanowire, carbon nanohorn, carbon aerogel, carbon xerogel or carbon nanoring. EXAMPLE - Carbon support (0.15 g) was added to anhydrous ethanol (300 ml) with water content of less than or equal to 1%, stirred for 30 minutes, sonicated for 20 minutes, and again stirred for 30 minutes. Platinum chloride (0.1328 g) or nickel chloride hexahydrate (0.0937 g) were added to an anhydrous ethanol (20 ml). Sodium acetate powder (1.455 g) and sodium borohydride (0.112 g) were added to the resulting solution and stirred for at least 4 hours. The obtained solution containing 20 ml ethanol was added to 300 ml ethanol and mixed to obtain corresponding carbon carried alloy nanoparticle catalyst.