The present work focuses on investigating the effect of novel Fe-modified Ti_0.5Sn_0.5O₂ supported by CuO on the physicochemical properties and catalytic performance for low temperature CO catalytic oxidation. Several measurements were employed to characterize the obtained samples, including XRD, N₂-physisorption (BET), XPS, EPR, H₂-TPR, ICP-AES, O₂-TPD, in situ DRIFTS. The results show as follows: (1) the doping of iron greatly enhances the properties for these modified catalysts, especially the reduction for surface CuO on the surface, which cause the creation of more surface Cu⁺ ions and corresponding oxygen vacancies; (2) the proper control of aggregation extent for surface copper oxide by Fe³⁺ significantly influences the catalytic performance; (3) the CuO/Fe₄Ti₁₀Sn₁₀ catalyst with appropriate doping FeO_x possesses larger specific surface area, more superior reducibility, better catalytic performance and excellent thermo-stability in CO oxidation; the performance is closely dependent on the specific surface area, the content of Cu⁺ and oxygen vacancy, the reducibility, the surface state of CuO, and adsorption capacities of these modified catalysts in CO catalytic oxidation. Furthermore, giving an example for CuO/Fe₄Ti₁₀Sn₁₀ catalyst, a possible reaction mechanism (schematic diagram) for CO oxidation is tentatively proposed to explain the essence for catalytic reaction.

目前的工作集中在研究新型的Fe改性的Cu负载的Fe改性的Ti _0.5 Sn _0.5 O ₂对低温CO催化氧化的理化性质和催化性能的影响。采用几种测量来表征获得的样品，包括XRD，N _2-物理吸附（BET），XPS，EPR，H ₂ -TPR，ICP-AES，O ₂ -TPD，原位DRIFTS。结果表明：（1）铁的掺杂大大提高了这些改性催化剂的性能，尤其是表面上的表面CuO的还原，这导致了更多的表面Cu ^{+的产生。}离子和相应的氧空位；（2）Fe ³⁺适当控制表面氧化铜的聚集程度显着影响催化性能。（3）适当掺杂FeO _x的CuO / Fe ₄ Ti ₁₀ Sn ₁₀催化剂具有较大的比表面积，更优异的还原性，更好的催化性能和优异的CO氧化热稳定性；性能与比表面积，Cu ⁺和氧空位的含量，还原性，CuO的表面状态以及这些改性催化剂在CO催化氧化中的吸附能力密切相关。此外，以CuO / Fe ₄ Ti为例初步提出了₁₀ Sn ₁₀催化剂，一种可能的CO氧化反应机理（示意图），以解释催化反应的实质。