The various wt% of Cs promoted CuO_x/CeO_2−δ catalysts were prepared by impregnation method and examined for CO oxidation. The 0.1 wt% Cs doped CuO_x/CeO_2−δ showed a maximum CO oxidation (22%) compared to the CuO_x/CeO_2−δ (9%) at light off temperature (40 ºC). The plausible CO oxidation mechanism has explained using characterization techniques like ATR-FTIR, XPS, XRD, SEM, H₂-TPR, and HRTEM. The formation of Cs₂O was responsible for the stabilization of Cu¹⁺ species. The Cs doping increases the electron density on the catalyst surface due to the charge diffusion. The Cs addition in CuCe leads to the formation of smaller Cu¹⁺ species, CuO nanorod, Ce³⁺ and adsorbed oxygen. The role of these species for CO oxidation at a lower temperature is explained in detail with plausible mechanism. The synergistic interaction of Cs with CuCe leads to the increase in CO conversion rate with decrease in the activation energy.

通过浸渍法制备了各种wt％的Cs促进的CuO _x / CeO2 _-δ催化剂，并检查了CO的氧化。在起燃温度（40ºC）下，与CuO _x / CeO2 _-δ（9％）相比，掺杂0.1 wt％Cs的CuO _x / CeO2 _-δ具有最大的CO氧化（22％）。使用诸如ATR-FTIR，XPS，XRD，SEM，H ₂ -TPR和HRTEM等表征技术可以解释可能的CO氧化机理。Cs ₂ O的形成负责Cu ¹⁺的稳定化种类。由于电荷扩散，Cs掺杂增加了催化剂表面上的电子密度。CuCe中Cs的添加导致形成较小的Cu ¹⁺物种，CuO纳米棒，Ce ³⁺和吸附的氧。详细解释了这些物质在较低温度下对CO氧化的作用。Cs与CuCe的协同相互作用导致CO转化率增加，活化能降低。