CuO/CeO₂–MnO₂ (CuCeMn-4) catalyst was prepared by redox method and was tested in the CO preferential oxidation in H₂-rich gases (CO PROX). CuO/CeO₂–Mn₂O₃ (CuCeMn-3) catalyst was prepared and tested for comparison. CuCeMn-4 exhibits higher catalytic activity than CuCeMn-3. The complete CO conversion with CO₂ selectivity of 92% can be obtained at 120 °C over CuCeMn-4. The catalysts were characterized by means of N₂ adsorption/desorption, XRD, H₂-TPR and XPS techniques. The results show that the interaction between MnO₂ and CeO₂ in catalyst is stronger than Mn₂O₃ and CeO₂, which can promote the mobility of oxygen species from CeO₂–MnO₂ to active copper species. XPS characterization further revealed that CuCeMn-4 contains richer lattice oxygen, higher amount of Cu⁺ species and less carbonate species on the surface as compared with CuCeMn-3. All these should be greatly responsible for the high activity of CuCeMn-4 catalyst.

采用氧化还原法制备了CuO / CeO ₂ -MnO ₂（CuCeMn-4）催化剂，并在富H ₂气体（CO PROX）中进行了CO优先氧化的测试。制备了CuO / CeO ₂ -Mn ₂ O ₃（CuCeMn-3）催化剂并进行了比较测试。CuCeMn-4的催化活性高于CuCeMn-3。在120°C的条件下，与CuCeMn-4相比，可以实现CO ₂选择性为92％的完全CO转化。催化剂通过N ₂吸附/解吸，XRD，H ₂ -TPR和XPS技术进行表征。结果表明，MnO ₂与CeO ₂之间的相互作用在催化剂是除Mn更强₂ ö ₃和的CeO ₂，它可以促进氧的迁移率从的CeO ₂ -MnO ₂至活性铜物质。XPS表征进一步显示，与CuCeMn-3相比，CuCeMn-4在表面上含有更丰富的晶格氧，更高的Cu ⁺种类和更少的碳酸盐种类。所有这些都应为CuCeMn-4催化剂的高活性起很大作用。