A Sinter-Resistant Catalytic System Based on Platinum Nanoparticles Supported on TiO2 Nanofibers and Covered by Porous Silica

摘要

Platinum is a key catalyst that is invaluable in many important industrial processes such as CO oxidation in catalytic converters, oxidation and reduction reactions in fuel cells, nitric acid production, and petroleum cracking. Many of these applications utilize Pt nanoparticles supported on oxides or porous carbon. However, in practical applications that involve high temperatures (typically higher than 300 °C), the Pt nanoparticles tend to lose their specific surface area and thus catalytic activity during operation because of sintering.