Dual Pd-Acid Sites Confined in a Hierarchical Core-Shell Structure for Hydrogenation of Nitrobenzene

A core-shell structured Pd@TS-1@meso-SiO2 catalyst with confined Pd nanometals has been fabricated by one-pot synthesis, impregnation method and sol-gel method. With the promotion of acid sites and protection of mesoporous silica shell, Pd@TS-1@meso-SiO2 shows higher activity than commercial comparison and higher stability than sample without mesoporous silica shell in the hydrogenation of nitrobenzene. The schematic illustration of the synergy effect is also proposed. A core-shell structured catalyst with dual active sites (Pd and acidic sites) was designed to investigate the synergistic effect of Pd and acid sites in TS-1 during the hydrogenation of nitrobenzene.image

Automated summary

A core-shell structured Pd@TS-1@meso-SiO2 catalyst with confined Pd nanometals has been synthesized, showing higher activity and stability in the hydrogenation of nitrobenzene. The synergy effect between Pd and acid sites in TS-1 has been proposed.