Preparation of highly dispersed Cu/SiO_2 doped with CeO_2 and its application for high temperature water gas shift reaction

摘要

Highly dispersed Cu/SiO2catalysts doped with CeO2have been successfully prepared viain-situself-assembled core-shell precursor route. The prepared catalysts were characterized by XRD, SEM, TPR, chemisorption and XPS techniques. The results showed that our newly developed method could not only prepare highly dispersed supported metal catalysts but also highly dispersed supported CeO2on silica. The highly dispersed CeO2showed strong interaction with highly dispersed Cu. The synergy between the highly dispersed CeO2and the highly dispersed Cu exhibited high catalytic activity for high temperature water gas shift reaction compared to the catalysts prepared with the routine method of incipient impregnation.