Abstract
采用溶剂法合成了热稳定性高的金属有机骨架材料MIL-53（AI）（MIL：Materials of Institut Lavoisier），用此材料为载体负载钴催化剂用于CO的催化氧化反应，并与Al2O3负载的钻催化剂进行了对比．采用热重．差热扫描量热（TG—DSC）、傅里叶变换红外（FTIR）光谱、X射线衍射（XRD）、N2物理吸附-脱附、透射电子显微镜（TEM）、氢气程序升温还原（H2-TPR）等方法对催化剂的结构性质进行了表征．TG和N2物理吸附．脱附结果表明，载体MIL-53（AI）有好的稳定性和高的比表面积：XRD以及TEM结果表明Co／MIL-53（AI）F负载的Co3O4颗粒粒径（平均约为5．03nm）明显小于Al2O3上Co3O4颗粒粒径（平均约为7．83nm）．MIL-53（AI）的三维多孔结构中分布均匀的位点能很好地分散固定Co3O4颗粒，高度分散的Co3O4颗粒有利于CO的催化氧化反应．H2-TPR实验发现Co／MIL（AI）催化剂的还原温度低于Co／Al2O3催化剂的还原温度，低的还原温度表现为高的催化氧化活性．CO催化氧化结果表明，MIL-53（AI）负载钴催化剂的催化活性明显高于Al3O3负载钴催化剂，MIL-53（AI）负载钴催化剂在160℃时使CO氧化的转化率达到98％，到180℃时CO则完全转化，催化剂的结构在催化反应过程中保持稳定．
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