中文摘要：

采用浸渍法制备了经不同温度焙烧的CuO/γ-Al2O3催化剂,并通过BET、XRD、UV-DRS、H2-TPR以及CO完全氧化反应,研究了不同焙烧温度对CuO/γ-Al2O3催化剂中CuO组分的分散、还原和催化性质的影响.结果表明：当焙烧温度为450℃时,CuO在γ-Al2O3上的分散容量约为0.56mmol/100m^2;当焙烧温度达到750℃时,Cu^2＋同时占据γ-Al2O3载体（110）面上的八面体和四面体空位.对于450℃焙烧的低CuO含量的样品,在H2-TPR结果中只观察到处于八面体空位的CuO物种的还原,而经750℃焙烧的样品则同时观察到处于八面体和四面体空位的CuO物种的还原,且处于八面体空位的CuO的还原会促进处于四面体空位的CuO的还原.处于八面体空位的CuO在CO完全氧化反应中的活性要高于处于四面体空位的CuO.

英文摘要：

CuO/γ-Al2O3 samples were prepared by impregnating γ-Al2O3 with an aqueous solution containing requisite amount of Cu（NO3）2. BET, XRD, UV-DRS, H2-TPR and CO oxidation were employed to characterize the dispersion, reduction behavior and catalytic properties of CuO/γ-Al2O3 catalyst calcinated at different temperatures. The results indicate that the dispersion capacity of CuO on the surface of γ-Al2O3 is about 0.56mmol/100m^2 when it is calcinated at 450℃; while for the samples calcinated at 750℃, Cu^2＋ would occupy both the octahedral and tetrahedral vacant sites on the （110） plane of γ-Al2O3. For samples with low CuO loading amount, only the reduction peak of Cu^2＋ in octahedral coordination environment is observed in xxCu/Al-450 samples; while for xxCu/Al- 750 samples, the reduction peaks of Cu^2＋ in octahedral and tetrahedral coordination environment can be observed and the reduction of Cu^2＋ in octahedral coordination environment would promote the reduction of Cu^2＋ in tetrahedral coordination environment. The CO oxidation results indicate that the activity of dispersed CuO species in octahedral coordination environment is higher than that in tetrahedral coordination environment.