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

Hiroaki Yotou, Takumi Okamoto, Miho Ito, Tohru Sekino, Shunichiro Tanaka

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

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 SBA-16 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 of the mixture 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.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalApplied Catalysis A: General
Volume458
DOIs
Publication statusPublished - 2013 May 10

Keywords

  • CO oxidation catalyst
  • Hydrothermal
  • Insertion
  • Mesoporous silica
  • Pt-loaded CeZrO

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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