We report the synthesis of xCuO/TiO₂-ZrO₂ catalysts containing 1, 5 and 10 wt % CuO by the sol-gel method. The solids were dried at 100 °C for 24 h and calcined at 400 °C for another 24 h in an open-air atmosphere. Part of these samples was impregnated with 0.5 wt % of PtO by the wet impregnation method. Samples were characterized by H₂-TPR, TPD-CO₂, SEM, TEM, XRD and 2-propanol decomposition. Our H₂-TPR results indicate that Pt impregnation on the xCuO/TiO₂-ZrO₂ system promotes the CuO reduction at lower temperature close to 190 °C. UV-Vis bands were associated with isolated Cu²⁺ ions in octahedral coordination corresponding to CuO particles; and isolated Cu²⁺ ions in coordination lower than octahedral. Pt impregnation on the surface of the xCTZ samples promotes new basic sites appearing at high temperature as confirmed by TPD-CO₂. The higher conversion for the decomposition of 2-propanol to acetone shows that the basic properties of the CuO_xPtO_x/TiO₂-ZrO₂ catalysts are superior to those of CuO_x/TiO₂-ZrO₂ samples.

我们报道了通过溶胶-凝胶法合成包含1、5和10 wt％CuO的xCuO / TiO ₂ -ZrO ₂催化剂。将固体在100℃下干燥24小时，并在露天气氛中在400℃下再煅烧24小时。通过湿式浸渍法将这些样品的一部分用0.5重量％的PtO浸渍。通过H ₂ -TPR，TPD-CO ₂，SEM，TEM，XRD和2-丙醇分解来表征样品。我们的H ₂ -TPR结果表明，在xCuO / TiO ₂ -ZrO ₂系统上浸渍Pt可以在接近190°C的较低温度下促进CuO的还原。UV-Vis谱带与孤立的Cu ^2+相关八面体配位的离子对应于CuO颗粒; 且孤立的Cu ²⁺离子配位低于八面体。TPD-CO ₂证实，xCTZ样品表面上的Pt浸渍促进了在高温下出现的新碱性位点。2-丙醇分解为丙酮的较高转化率表明，CuO _x PtO _x / TiO ₂ -ZrO ₂催化剂的基本性能优于CuO _x / TiO ₂ -ZrO ₂样品。