铜铈钛复合氧化物的制备及其催化一氧化碳氧化反应的性能  

Preparation and Catalytic Properties of Copper-cerium-titanium Mixed Oxides for Carbon Monoxide Oxidation

作　　者：王倩[1] 毛东森[1] 方珍妮[1] 俞俊[1] 杨志强[1] 

机构地区：[1]上海应用技术学院化学与环境工程学院,上海200235

出　　处：《上海应用技术学院学报（自然科学版）》2010年第2期124-127,共4页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海市教委重点学科建设项目(J51503);上海应用技术学院研究生创新能力培养专项资金项目(YC200906);上海应用技术学院科技发展基金项目(KJ2008-01)

摘　　要：采用共沉淀法制备了不同钛含量的铜铈钛复合氧化物催化剂（Cu0.1CCe0.9-xTixO2，X=0～0．3），采用微反-色谱评价装置考察了Cu0.1Ce0.9-xTixO2催化CO氧化反应的活性，并采用氮吸附／脱附，X-射线衍射以及程序升温还原等技术对催化剂进行了表征。结果表明，适量Ti（X≤0．15）的加入，提高了Cu0.1Ce0.9-xTixO2催化剂中CuO的分散度，从而提高了其催化活性。而当Ti含量过高（X=0．3）时，Cu0.1Ce0.9-xTixO2催化剂中CuO的分散度反而降低，从而导致其催化活性显著降低。A series of copper-cerium-titanium were prepared by co-precipitation method that is by mixings oxides with different amounts of titanium （Cu0.1Ce0.9-xTixO2）. Their catalytic properties for CO oxidation were evaluated by using a microreactor-GC system. The techniques of N2 adsorp- tion/desorption, X-ray diffraction （XRD） and temperature-programmed reduction by H2 （H2 - TPR） were employed for catalyst characterization. The results showed that the addition of proper amounts （x≤ 40.15） of titanium improved the dispersion of CuO in the catalyst and consequently resulted in the in- crease of the catalytic activity. However, the addition of too much amount of titanium （ x = 0.3） decreased the dispersion of Cu0 in the catalyst, so resulted in the significant decrease of the catalytic ac- tivity.

关 键 词：CuO—CeO2催化剂 钛 CO氧化 共沉淀 

分 类 号：O643.36[理学—物理化学]