【作者】 谭海燕； 胡卫兵； 王祥； 李伟；

【Author】 Hai-Yan Tan;Wei-Bing Hu;Xiang Wang;Wei Li;School of Chemical and Environmental Engineering,Hubei University for Nationalities;

【机构】 湖北民族学院化学与环境工程学院；

【摘要】 硒作催化剂不但具有良好的催化活化CO的性能及反应过程相中转移的催化特性,而且能循环使用。用Se作催化剂替代贵金属催化CO氧化反应,具有原子经济性高、成本低、环境友好、路线简短、后处理方便等优点,因而引起人们的广泛关注^[1]。金属有机骨架材料由于比表面加大,结构可调,催化部位多被广泛用于催化剂载体,但由于其稳定性不高限制了其在气相催化反应中的应用^[2,3]。本文采用溶剂法合成了热稳定性高的金属有机骨架材料MIL-53（Al）,用此材料为载体负载硒催化剂用于CO的催化氧化反应,采用热重-差热扫描量热（TG-DSC）、透射电子显微镜（TEM）等方法对催化剂的结构性质进行了表征。TG结果表明,载体MIL-53（Al）有好的稳定性,TEM结果表明Se/MIL-53（Al）上的SeO₂颗粒粒径细小均匀,MIL-53（Al）的三维多孔结构中分布均匀的位点能很好地分散固定SeO₂颗粒,高度分散的SeO₂颗粒有利于CO的催化氧化反应,催化剂的结构在催化反应过程中保持稳定。更多还原

【Abstract】 The selenium catalyst possesses both efficiency to catalytically activate carbon monoxide and the function of phase-transfer catalysis. What is more, it can be recycled. Which has many advantages such as mild reaction conditions, high atomic economy, low cost, benign environment, short synthesis approach and simple operation,which arouse broad attention. At the same time metal-organic frameworks（MOFs） have been surveyed for their possible roles in catalytic applications owing to their high pore volume, large surface area, geometrial control and varied nano structure which can be controlled by a self-assembly process. But promising application of metal-organic frameworks（MOF） catalyzer for CO oxidation is strongly restricted by the low activity and instability. In this paper, metal-organic framework（MOF） material MIL-53（Al） with high thermal stability has been prepared by solvothermal method, serving as a support material of selenium catalyst for CO oxidation. The catalysts were characterized by thermogravimetric-differential scanning calorimeter（TG-DSC）, transmission electron microscopy（TEM）. TEM results indicated that the size of SeO₂ nanoparticles supported on MIL-53（Al） support was small. The highly dispersed SeO₂ nanoparticles, which resulted from the three dimension porous structure of MIL-53（Al）, give rise to a superior catalytic activity for CO oxidation.更多还原