[O-2:1].[Zr+4:2].[O-2].C([O-])(=O)C([O-])=[O:6].[Sn+4:10].C([O-])(=O)C([O-])=[O:13].C([O-])(=O)C([O-])=[O:19].[NH4+].[NH4+].O.[N+]([O-])([O-])=[O:27].[Pd+2:30].[N+]([O-])([O-])=O.N.N.N.N.[N+]([O-])([O-])=O.[N+]([O-])([O-])=O.[Pt+2:47]>O>[O-2:6].[Zr+4:2].[Sn+4:10].[Pt+2:47].[Pd+2:30].[O-2:13].[O-2:19].[O-2:27].[O-2:1].[O-2:6]The catalyst was synthesized using impregnation method. 10 g of the above crushed zirconium oxide (0.85 mm and 1.18 mm) was placed in a round bottom reactor. 0.56 g of tin oxalate and 0.54 g of ammonium oxalate was dissolved in 10 ml of water. 0.3 g of palladium nitrate hydrate, tetraammineplatinum(II) nitrate, was added to the tin oxalate solution, followed by impregnating to the above zirconium oxide by stepwise incipient wetness using a rotating dryer. The metal-coated zirconium oxide was dried and calcined under the conditions in Example 1.
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