Novel method for insertion of Pt/CeZrO2 nanoparticles into mesoporous SBA-16 using hydrothermal treatment

Authors: Hiroaki Yotou, Takumi Okamoto, Miho Ito, Tohru Sekino, Shun-Ichiro Tanaka

Abstract:
An investigation was performed to evaluate the possibility of using hydrothermal treatment for inserting Pt/CeZrO₂ nanoparticles into the mesopores of the previously reported SBA-16 mesoporous silica. The results showed that the Pt/CeZrO₂ nanoparticles were successfully inserted into the mesopores of SBA16 by the hydrothermal treatment, and the highly ordered mesostructure of SBA-16 was retained after the insertion of the nanoparticles. The obtained material was used as a catalyst for the CO oxidation reaction. The catalytic activity and thermal stability of Pt/CeZrO₂, inserted via hydrothermal treatment, were higher than those ofthemixture of Pt/CeZrO₂ and SBA-16. Specifically,the temperature at which 50% CO oxidation was achieved after the catalyst was annealed at 800^◦C was 290^◦C for the sample prepared via hydrothermal treatment at 140^◦C. This temperature at which 50% CO oxidation was achieved is significantly lower than 480^◦C required for the catalyst prepared via simple mixing. 

Keywords:
Mesoporous silica
Pt-loaded CeZrO₂
Insertion
Hydrothermal
CO oxidation catalyst

Published in: Applied catalysis A: General  (Volume 458, Pages 1-206, 10 May 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Novel method for insertion of Pt/CeZrO2 nanoparticles into mesoporous SBA-16 using hydrothermal treatment

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