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The Relation between Catalytic Activity of CO Oxidation and Support Structure in Oxidation Catalysts using Gold Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Shiho Nagano ,
Koji Tajiri  and
Yutaka Tai
Shiho Nagano
Affiliation:
[email protected], AIST, Materials Research Institute for Sustainable Development, Anagahora Shimoshidami, Moriyama-ku, Nagoya, N/A, 463-8560, Japan
Koji Tajiri
Affiliation:
[email protected], AIST, Materials Research Institute for Sustainable Development, Japan
Yutaka Tai
Affiliation:
[email protected], AIST, Materials Research Institute for Sustainable Development, Japan
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Abstract

Thiol-passivated gold nanoparticles were adsorbed on several kinds of support materials such as titania-coated silica aerogels and xerogels etc., and then the thiol was removed by heat treatment. The catalytic activity of the prepared composites for CO oxidation reaction was measured, and the effects of the support on the catalytic activity were investigated. Density of the supports, namely, whether aerogel supports or xerogel ones, hardly affected the catalytic activity. It was found that the catalysts having high catalytic activity could be obtained by this preparation method, even using the xerogels as the support. Calcination of the supports before adsorption of the gold nanoparticles affected the activity. The difference of the catalytic activity was observed between the composites with same gold nanoparticle size, so it was considered that the surface condition of the support materials affects the state of gold nanoparticles in composite.

Keywords

Aucatalyticnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 900: Symposium O – Nanoparticles and Nanostructures in Sensors and Catalysis , 2005 , 0900-O03-11
Copyright
Copyright © Materials Research Society 2006

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