Catalytic Behavior of Au Core / Pd Shell Bimetallic Nanoparticles on Silica Prepared by Sonochemical and Sol–Gel Processes

A unique catalyst, Au core and Pd shell bimetallic nanoparticles immobilized on porous silica exhibiting a considerable high activity for the hydrogenation of cyclohexene, was prepared via two steps composed of the sonochemical reduction method and the sol–gel process under a low temperature condition.