Mesoporous SiO2-Supported Pt Nanoparticles for Catalytic Application
N2 adsorption-desorption isotherms of different size of SiO2 nanoparticles before and after loading Pt nanoparticles on (a) NP-100, (b) NP-100-Pt, (c) NP-1000, and (d) NP-1000-Pt. The results indicate that NP-100 which was made by less fructose template is essentially microporous which can be blocked by Pt. N2 adsorption-desorption isotherms (c) and (d) show that NP-1000 and NP-1000-Pt are mainly mesoporous even after Pt loading. Mesoporous SiO2 support leads faster gas flow than microporous support to thus mesoporous Pt/SiO2 have much better activity.