CePr and CeMn mixed oxide catalysts were synthesized by inserting Pr and Mn atoms into CeO₂. Catalytic performance on soot combustion was investigated, and several characterizations were carried out using X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller surface area analysis, H₂ temperature-programmed reduction, and X-ray diffraction. Results show that a cubic fluorite structure solid solution can be formed with Pr and Mn doped into CeO₂ lattice. Three oxygen species, namely, lattice oxygen O_I (O²⁻), defect oxygen species O_II (O₂⁻, O₂²⁻, and O⁻), and hydroxyl-like groups and adsorbed molecular water O_III, exist in the solid solution structure. In general, the defect oxygen species O_II is responsible for soot combustion. CePr exhibits fast oxidation rate because of the presence of open oxygen migration channel (O_I↔O_II↔O_III), and reactive oxygen species O_II can continue to be replenished. CeMn possesses a large amount of surface active oxygen, which results in excellent low-temperature catalytic activity.

将Pr和Mn原子插入CeO ₂中合成了CePr和CeMn混合氧化物催化剂。研究了碳烟燃烧的催化性能，并使用X射线光电子能谱，Brunauer-Emmett-Teller表面积分析，H _2程序升温还原和X射线衍射进行了一些表征。结果表明，可以将Pr和Mn掺杂到CeO ₂晶格中形成立方萤石结构固溶体。三氧种，即，晶格氧O_我（O ^2-），缺陷氧物种ø _II（O ₂ ^-，O- ₂ ^2-，和O ^-），并且在固溶体结构中存在羟基样基团和吸附的分子水O _III。通常，缺陷氧物种O _II负责煤烟燃烧。CEPR呈现因为开放氧迁移通道（O的存在的快速氧化速率_我↔O _II ↔O _III），和活性氧ö _II可以继续进行补充。CeMn具有大量的表面活性氧，因此具有出色的低温催化活性。