Table of Contents
ISRN Nanomaterials
Volume 2013, Article ID 745397, 7 pages
http://dx.doi.org/10.1155/2013/745397
Research Article

Mesoporous SiO2-Supported Pt Nanoparticles for Catalytic Application

Department of Chemistry, Tsinghua University, Beijing 100084, China

Received 4 December 2012; Accepted 30 December 2012

Academic Editors: C. Angeles-Chavez, A. Fidalgo, M. Mirzaei, and A. V. Raghu

Copyright © 2013 Yingze Cao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

SiO2 nanoparticles have been synthesized by combining Stober’s method and nonsurfactant process. The diameters and pore sizes can be controlled by altering the template and its concentration. Mesoporous SiO2 obtained this way has extremely large surface area compared with most oxide supports, which benefits the catalytic performance. Pt nanoparticles were in situ grown on and in mesoporous SiO2 nanoparticles with low amount of the metal and high load ratio. Furthermore, we firstly developed a novel route, called “one-pot” method, to prepare Pt/SiO2 catalyst where mesoporous silica preparing and Pt loading occurred in one step. This method is more efficient in saving reagent, since it can prevent Pt loss. In the meantime, it enables the template to reduce agent. The catalytic activity of Pt/SiO2 samples was measured by CO oxidation. It is indicated that the supporting silica with mesopores is more active than silica with micropores.