Nanosized copper-doped ceria CuCe catalysts with a large surface area and well-developed mesoporosity were synthesized by a surfactant-assisted co-precipitation method. The prepared catalysts with different Cu doping concentrations were characterized by XRD, DLS analysis, TEM, BET, Raman, H₂-TPR and in situ DRIFTS techniques. The influence of Cu content on their catalytic performance for CO oxidation was also studied. The XRD results indicate that at a lower content, the Cu partially incorporates into the CeO₂ lattice to form a CuCe solid solution, whereas a higher Cu doping causes the formation of bulk CuO. Copper doping favors an increase in the surface area of the CuCe catalysts and the formation of oxygen vacancies, thereby improving the redox properties. The CuCe samples exhibit higher catalytic performance compared to bare CeO₂ and CuO catalysts. This is ascribed to the synergistic interaction between copper oxide and ceria. In particular, the Cu_0.1Ce catalyst shows the highest catalytic performance (T₅₀ = 59 °C), as well as excellent stability. The in situ DRIFTS results show that CO adsorbed on surface Cu⁺ (Cu⁺–CO species) can easily react with the active oxygen, while stronger adsorption of carbonate-like species causes catalyst deactivation during the reaction.

中文翻译：

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通过简便的 CTAB 辅助合成在介孔铜掺杂二氧化铈催化剂上催化氧化 CO

采用表面活性剂辅助共沉淀法合成了具有大比表面积和良好介孔率的纳米铜掺杂二氧化铈CuCe催化剂。采用XRD、DLS分析、TEM、BET、拉曼、H ₂ -TPR和原位漂移技术对制备的不同Cu掺杂浓度的催化剂进行了表征。还研究了Cu含量对其催化CO氧化性能的影响。XRD结果表明，在较低含量下，Cu部分结合到CeO _2中。晶格形成CuCe固溶体，而较高的Cu掺杂导致形成块状CuO。铜掺杂有利于增加CuCe催化剂的表面积和氧空位的形成，从而改善氧化还原性能。_{与裸 CeO 2}和 CuO 催化剂相比，CuCe 样品表现出更高的催化性能。这归因于氧化铜和二氧化铈之间的协同作用。特别是Cu _0.1 Ce 催化剂表现出最高的催化性能（T ₅₀ = 59 °C），以及优异的稳定性。原位DRIFTS结果表明，CO 吸附在表面 Cu ⁺ (Cu ⁺-CO物种）很容易与活性氧发生反应，而碳酸盐类物种的更强吸附会导致反应过程中催化剂失活。