Cerium oxide based catalysts are active for soot oxidation, while serious catalyst deactivation feasibly occurs due to thermal sintering. In this study, Ru and Ag supported on CeO₂ were prepared and their catalytic performances as well as thermal durability for soot oxidation were evaluated. Characterization results show that thermal treatment at 800 °C leads to substantial crystalline growth of CeO₂ and Ag particles in Ag/CeO₂. In contrast, crystalline growth of CeO₂ is remarkably alleviated and high dispersion of Ru particles is effectively maintained on Ru/CeO₂ owing to the formation of RuOCe bonds. As a result, catalyst recycling and thermal pretreatment at 800 °C lead to remarkably catalyst deactivation of CeO₂ and Ag/CeO₂, but slightly declined activity on Ru/CeO₂. The combination of experiments and DFT calculations clearly indicates that the strong interactions between Ru and CeO₂ account for the high catalytic activity and strong thermal duration of Ru/CeO₂ for soot oxidation.

基于氧化铈的催化剂对烟灰氧化具有活性，而由于热烧结可能会发生严重的催化剂失活。_{在这项研究中，制备了负载在 CeO 2上的}Ru 和 Ag，并评估了它们的催化性能以及对烟灰氧化的热耐久性。表征结果表明，在 800 °C 的热处理导致_{在 Ag/CeO 2中的 CeO 2}和 Ag 颗粒的。相反，由于形成了RuO _{，CeO 2}的晶体生长得到了显着缓解，并且Ru颗粒在Ru/CeO _{2上的高度分散得到了有效维持。}Ce 键。结果，催化剂回收和800℃的热预处理导致CeO ₂和Ag/CeO _{2的催化剂显着失活，但对Ru/CeO 2}的活性略有下降。实验和 DFT 计算的结合清楚地表明，Ru 和 CeO _{2之间的强相互作用解释了 Ru/CeO 2}对烟灰氧化的高催化活性和长热持续时间。