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

Paper ID Volume ID Publish Year Pages File Format Full-Text
40450 45854 2013 8 PDF Available
Title
Novel method for insertion of Pt/CeZrO2 nanoparticles into mesoporous SBA-16 using hydrothermal treatment
Abstract

•Pt-loaded CeZrO2 nanoparticles were inserted into mesopores using hydrothermal treatment.•The ordered mesostructure of SBA-16 was retained after the insertion of the nanoparticles.•Higher hydrothermal temperatures enabled the insertion of more nanoparticles.•The obtained material was used as a catalyst for the CO oxidation reaction.•The hydrothermal insertion method resulted in a catalyst with greater catalytic activity and thermal stability.

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.

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Keywords
Mesoporous silica; Pt-loaded CeZrO2; Insertion; Hydrothermal; CO oxidation catalyst
First Page Preview
Novel method for insertion of Pt/CeZrO2 nanoparticles into mesoporous SBA-16 using hydrothermal treatment
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 458, 10 May 2013, Pages 137–144
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis