Silver-loaded praseodymium doped ceria (XAg/PDC) was synthesized by microwave-assisted co-precipitation and wetness impregnation. XRD confirms the fluorite structure of ceria without secondary phase, and Raman spectroscopy represents the increased generation of oxygen vacancies with Ag loading. The TEM analysis shows lattice fringes corresponding to both CeO₂ and Ag on the surface. The BET and BJH analysis of catalyst confirms the high porosity accompanied by high surface area and pore diameter of 5Ag/PDC and 15Ag/PDC, making it more active for the oxidation reaction. From the XPS analysis the amount of surface Ce³⁺ concentration and the surface chemisorbed oxygen species (O ²₂ ) is high for 5Ag/PDC and 15Ag/PDC, in line with XRD and Raman results. The soot oxidation T₅₀ temperature follows the trend: 5Ag/PDC∼15Ag/PDC<10Ag/PDC<20Ag/PDC<0Ag/PDC. The Ag loading increased the surface reducibility of cerium ions and thus 5 wt% was optimized.

通过微波辅助共沉淀和湿法浸渍合成了载银镨掺杂二氧化铈 (XAg/PDC)。XRD 证实了二氧化铈的萤石结构，没有第二相，拉曼光谱表明随着 Ag 负载增加氧空位的产生。TEM分析显示对应于表面上的CeO ₂和Ag的晶格条纹。催化剂的 BET 和 BJH 分析证实了 5Ag/PDC 和 15Ag/PDC 的高孔隙率伴随着高表面积和孔径，使其对氧化反应更加活跃。从 XPS 分析，表面 Ce ³⁺浓度和表面化学吸附的氧物质 (O ² ₂ ) 对于 5Ag/PDC 和 15Ag/PDC 来说较高，与 XRD 和拉曼结果一致。烟尘氧化T ₅₀温度的变化趋势为：5Ag/PDC∼15Ag/PDC<10Ag/PDC<20Ag/PDC<0Ag/PDC。Ag 负载增加了铈离子的表面还原性，因此优化了 5 wt%。