Pd/Ce1-xZrxO2/SBA-15 catalysts: preparation and catalytic properties for methane combustion

摘要

A series of Pd/SBA-15 and Pd/Ce1-xZrxO2/SBA-15 (x=0, 0.5, 1) catalysts with different Pd loadings were prepared by the impregnation method. The catalysts were characterized using XRD and TPR techniques. The catalytic performance for the catalytic combustion of methane was investigated. The results showed that both Pd/SBA-15 and Pd/Ce1-xZrxO2/SBA-15 catalysts exhibited an excellent catalytic activity in methane combustion. In the Pd/Ce1-xZrxO2/SBA-15 catalysts, the activity increased with increasing of Zr content. After incorporation of Pd and Ce1-xZrxO2 in the SBA-15 support, all catalysts still possessed ordered hexagonal mesoporous structures. There were the stronger interaction among the Pd and the Ce1-xZrxO2 and the SBA-15 support. The interaction could significantly modify the redox performance and affect the catalytic activity of the catalysts.