利用反向共沉淀法合成CuCe_1-xMn_xO_y复合氧化物催化剂，X射线衍射分析（XRD）和拉曼（Raman）表征结果表明，反向共沉淀法可以将Cu、Mn离子在CeO₂晶格中有效掺杂并形成晶体粒径较小的固溶体。程序升温还原（H₂-TPR）与X射线光电子能谱（XPS）表征结果表明，Cu、Mn、Ce之间存在强相互作用，有效提升了氧化物的氧化还原性能。所合成的CuCe_1-xMn_xO_y复合氧化物系列催化剂在碳烟颗粒催化氧化中均表现出良好的反应活性，其中CuCe_0.8Mn_0.2催化剂表现出最佳活性，T₅₀仅为354℃，并且在循环测试中也基本保持稳定。

A series of CuCe_1-xMn_xO_y composites are prepared by reverse co-precipitation method.The results by X-ray diffraction analysis (XRD) and Raman analysis reveal the successful incorporation of Cu and Mn cations into the ceria framework through the reverse co-precipitation method,which induces a reduced crystal size of CeO₂ in the as-prepared composites.The H₂-temperature programmed reduction (H₂-TPR) and X-ray photoelectron spectroscopy (XPS) analysis indicates the presence of strong interaction between Cu,Mn and Ce cations,which shows positive impact on the redox property of the samples.All CuCe_1-xMn_xO_y composites show high catalytic activity towards soot oxidation.Particularly,CuCe_0.8Mn_0.2 shows the best catalytic activity with a T₅₀ of 354℃ and also a good stability in the repeated tests.

夏永康(1993-),男,硕士研究生,研究方向为环境催化,xia1239312155@163.com