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A novel Pt/CeO(2)-ZrO(2)-Bi(2)O(3) catalyst was prepared to realize complete CO oxidation at room temperature or below even in the presence of moisture. Using this catalyst, a high CO oxidation activity and a high stability against moisture have been realized simultaneously.

A Pt/Ce0.64Zr0.16Bi0.20O1.90/γ-Al2O3 catalyst was prepared in order to establish complete oxidation of ethylene at temperatures below 100 °C. Ethylene was completely oxidized over the catalyst as low as at 65 °C, while over Pt/γ-Al2O3, which has been well known as an active oxidation catalyst, complete oxidation was achieved at 145 °C.

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