In this work, the Ag loaded Ce-based catalyst was synthesized (by the sol-gel method) and its performance was studied by TG, H₂-TPR, XRD, SEM, TEM, BET and XPS. The results show that Ag nanoparticles be successfully loaded onto the CeO₂ surface and the relative content of Ag nanoparticles is about 10.22 wt.% close to the theoretical value (10%). XPS shows that Ag nanoparticles induce a great number of oxygen vacancies in the CeO₂ lattice through the electronic transfer, and H₂-TPR indicates that the Ag-assisted CeO₂ catalyst exhibits a better reduction performance and Ag nanoparticles can promote O^- transform into O^2-. The catalytic activity for soot oxidation was studied by TG under air atmosphere and the activity was found to be obviously enhanced when Ag nanoparticles be load on the surface of CeO₂ (T₁₀ = 386 °C, T₉₀ = 472.5 °C, T_m = 431 °C). The reaction mechanism was also presented and O ₂ ^- species is regarded as the determinant factor for the catalytic activity.

在这项工作中，合成了负载银的铈基催化剂（通过溶胶-凝胶法），并通过TG，H ₂ -TPR，XRD，SEM，TEM，BET和XPS研究了其性能。结果表明，将Ag纳米颗粒成功地负载到CeO ₂表面上，并且Ag纳米颗粒的相对含量为约10.22wt。％，接近理论值（10％）。XPS显示，银纳米颗粒诱导大量以CeO氧空位的₂通过电子转移晶格，和H ₂ -TPR表明银辅助的CeO ₂催化剂显示出更好的性能下降和Ag纳米颗粒可促进ö ^-转变成O ²。用TG在空气中研究了烟灰氧化的催化活性，发现当Ag纳米颗粒负载在CeO ₂表面（T ₁₀ = 386°C，T ₉₀ = 472.5°C，T _m时，活性明显提高）。= 431°C）。该反应机理进行了介绍和O ₂ ^-种类被认为是用于催化活性的决定因素。