CuO/Ce-Zr-La-O催化剂的表征及CO氧化活性

Characterization and Catalytic Oxidation of CO on Surface of CuO/Ce-Zr-La-O Catalyst

采用柠檬酸溶胶 凝胶法制备的Ce Zr La O固溶体为载体,制备CuO Ce Zr La O催化剂,用XRD,Raman,TPR等实验技术对Ce Zr La O固溶体及CuO Ce Zr La O的物相、Redox性能进行了表征。实验结果表明,Ce0.7Zr0 3-yLayO固溶体的还原性能与La含量有关,适量的La能促进固溶体的氧化还原。CuO的负载量为6%时,CuO Ce0.7Zr0.15La0.15O的活性最高,高分散且与载体相互作用的CuO是CO氧化活性相。

The CeZrLaO solid solution was prepared by the solgel method. The structure and the redox behavior of CeZrLaO solid solution and CuO/CeZrLaO catalysts were investigated by using XRD, Raman and TPR techniques. The results show that the reduction capability of Ce0.7Zr0.3-yLayO solid solution is related to content of La. Appropriate content of La can enhance the redox capability of the solid solution. The oxidation activity of the CuO(6%)/Ce0.7Zr0.15La0.15O catalyst is the highest. CuO, which finely dispersed and interacted with the support, is the activated site of oxidation activity.