KCS

The metal catalysts, usually dispersed as nanometer-sized particles on supports with high surface area, are subject to sintering or coalescence to minimize their surface energies through the Ostwald ripening process. This results in a decrease in the amount of surface atoms in metal nanoparticles and a consequent loss of catalytic activity. Several strategies towards stabilization of nanometer-sized metal particles against the sintering problem have been pursued, including design of metal/metal oxide core-shell nanostructures, addition of stabilizing metal oxides, and use of sintering-resistant supports. Here, we present an improved method to synthesize an in-situ anchored Pt NPs into the frameworks of the sulfur-containing mesoporous silica (SMS) through co-condensation method. The Pt NPs well dispersed and anchored into the frameworks of the SMS are enough stable to be recycled multiple times.