TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises: (a1) adding carbon-nanotubes to a first solvent; (a2) adding a catalyst precursor into the first solvent with carbon-nanotubes to form a first solution mixture, where the catalyst precursor is cerium compound, titanium compound, tin compound and/or zinc compound; (a3) drying the first solution mixture of step (a2) to form a dried residue; (a4) dispersing the dried residue in a second solvent; (a5) adding a platinum precursor to the second solvent to form a second solution mixture; and (a6) drying the second solution mixture to achieve (I) having a structure of platinum/oxygen donor/carbon-nanotube; Preferred Components: The oxygen donor is cerium oxide, titanium oxide (both preferred), tin oxide and/or zinc oxide. The catalyst precursor in the step (a2) is a metal salt or a metal alkoxide. Preferred Process: The method further comprises, after the step (a3), performing heat-treatment to the dried residue at 300 degrees C or above. The method further comprises, after the step (a4), heating the second solvent with the added residue at 150-200 degrees C; and after the step (a5), adjusting the pH value of the second solution mixture to 7-9.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The first solvent in the step (a1) is alcohols, acids and/or ketones (preferably isopropyl alcohol, ethanol, propanol, citric acid, polyethylene glycol, stearic acid, or an alcohol having eight or more carbon atoms). The second solvent in the step (a4) is an alcohol and/or water. EXAMPLE - Carbon nanotubes (0.05 g) was added to 0.02 M citric acid (50 ml) to provide a first solution. 0.05 M cerium nitrate (Ce(NO3)3. 6H2O) (5.8 ml) was added to the first solution and stirred. The stirred first solution was dried, the residues (in the form of powder) were collected and were processed by heat-treatment at 700 degrees C for 1 hour. After heat treatment, residues were dispersed in ethylene glycol (reducing agent) to provide a second solution. Subsequently, the second solution was heated at 170 degrees C and platinum chloride (H2PtCl6. 6H2O) (a platinum precursor) was added to it, the pH value of the solution was then adjusted to 8 with potassium hydroxide. Finally, the solution was stirred for 20 minutes to dry and formed the hybrid catalyst with a structure of platinum/cerium oxide/carbon-nanotube.