In this paper, CuO_x@Ag/CeO₂ catalysts were synthesized by simple wet-chemical method and equal volume impregnation method. The obtained catalysts were subjected to soot temperature programmed oxidation (soot-TPO) activity tests and were further characterized by various techniques such as X-ray diffraction (XRD), transmission electron microscopy/high-resolution transmission electron microscopy (TEM/HR-TEM), N₂ physisorption, X-ray photoelectron spectroscopy (XPS) and H₂-temperature programmed reduction (H₂-TPR). The results show that CuO_x@Ag/CeO₂ synthesized presents well controlled core-shell structures, with nano-cube like Cu₂O as the core and Ag decorated polycrystalline CeO₂ grafting layers as the shell. Such core-shell structured CuO_x@Ag/CeO₂ can successfully construct a secondary oxygen delivery channel (CuO_x → CeO₂ → Ag) to effectively transfer bulk oxygen of the catalyst to the soot, resulting in its excellent soot oxidation activity compared to CuO_x@CeO₂. The potential benefiting effect by Ag introduction over Cu@Ag/Ce can be concluded as: (i) pumping lattice oxygen and accelerating gaseous O₂ dissociation to generate significantly increased active surface oxygen content; (ii) modulating a moderate surface oxygen vacancies concentration to maintain more highly active O₂^– species.

本文采用简单的湿化学法和等体积浸渍法合成了CuO _x @Ag/CeO _{2催化剂。}对所得催化剂进行碳烟升温程序氧化（soot-TPO）活性测试，并通过X射线衍射（XRD）、透射电子显微镜/高分辨率透射电子显微镜（TEM/HR-TEM）等技术进行进一步表征。 )、N ₂物理吸附、X 射线光电子能谱 (XPS) 和 H ₂ -程序升温还原 (H 2 -TPR ₎。结果表明，合成的CuO _x @Ag/CeO ₂呈现出可控的核壳结构，具有类似Cu _{2的纳米立方体}O为核，Ag修饰的多晶CeO ₂接枝层为壳。这种核壳结构的CuO _x @Ag/CeO ₂可以成功地构建二次氧输送通道（CuO _x → CeO ₂ → Ag），有效地将催化剂的体氧转移到烟灰中，使其具有优异的烟灰氧化活性。 CuO _x @CeO ₂。Ag 引入对 Cu@Ag/Ce 的潜在有益效果可以总结为：（i）泵送晶格氧和加速气态 O ₂解离以产生显着增加的活性表面氧含量；(ii) 调节适度的表面氧空位浓度以保持更高活性的 O ₂ ^–物种。