Direct synthesis of hydrogen peroxide from hydrogen and oxygen over a Pd core-silica shell catalyst

作者：Lee HwaJung; Kim Seongmin; Lee Dae Won; Lee Kwan Young^*

来源：Catalysis Communications, 2011, 12(11): 968-971.

DOI：10.1016/j.catcom.2011.03.001

• Hydroen peroxide
• Direct synthesis
• Palladium
• Colloid nanoparticle
• Core-shell

Pd core-silica shell particles (Pd@SiO(2)) were prepared by encapsulating Pd colloids with a silica shell through the Stober method. The palladium core particles were well dispersed (Dispersion = 43%) and had uniform size (4 nm) and shape inside the porous silica shell. Pd@SiO(2) showed good catalytic activity (554 mmol H(2)O(2)/g Pd.h) for the direct synthesis of H(2)O(2), which was better than those of impregnated Pd catalysts (Pd/SiO(2) and Pd/Al(2)O(3)). It is expected that the stabilization of less coordinated Pd crystals in a highly dispersed state by core-shell formation is effective for the improvement of H(2)O(2) production.

• 出版日期2011-6-10