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以新型金属有机骨架材料MIL-53(Al)和传统多孔材料Al_2O_3为载体,采用满孔浸渍法负载铜铈金属离子,分别得到(Cu-Ce)/MIL-53(Al)催化剂与(Cu-Ce)/Al_2O_3催化剂用于CO氧化,对两种材料的催化性能进行了对比研究。样品通过X射线衍射(XRD)、透射电子显微镜(TEM)以及N_2物理吸附-脱附等方法进行表征。结果表明,载体MIL-53(Al)的比表面积高于Al_2O_3的比表面积,MIL-53(Al)上负载的铜铈颗粒分布均匀且粒径小于Al_2O_3上铜铈颗粒粒径。在CO氧化反应中,MIL-53(Al)负载铜铈催化剂的催化活性明显高于Al_2O_3负载的铜铈催化剂,(Cu-Ce)/MIL-53(Al)催化剂在120~130℃时使CO氧化的转化率达到100%,(Cu-Ce)/Al_2O_3催化剂在205~235℃时使CO氧化的转化率达到100%。
(Cu-Ce) / MIL-53 (Al) catalysts and (Cu-Ce) / Al 2 O 3 catalysts were prepared by impregnation of copper-cerium metal ions with a new type of metal-organic framework material MIL-53 (Al) and conventional porous Al 2 O 3 as support. Ce) / Al_2O_3 catalyst for CO oxidation, the catalytic performance of the two materials were compared. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N 2 physisorption-desorption. The results show that the specific surface area of the carrier MIL-53 (Al) is higher than the specific surface area of Al 2 O 3, and the particles of cerium-cerium supported on MIL-53 (Al) are uniformly distributed and the particle size is smaller than that of Al 2 O 3. In the CO oxidation reaction, the catalytic activity of copper-cerium supported on MIL-53 (Al) was obviously higher than that of Cu-Ce supported on Al_2O_3. The catalyst of (Cu-Ce) / MIL- The conversion of oxidation reached 100%. The conversion of CO to Cu was (Cu-Ce) / Al 2 O 3 at 205 ~ 235 ℃.