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Synthesis of Pt–OMG mesoporous composite via nanocasting and chemical vapor infiltration

Published online by Cambridge University Press:  16 January 2013

Hoi Yung ,
Kwong-Yu Chan  and
Frank Leung-Yuk Lam
Hoi Yung*
Affiliation:
Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong
Kwong-Yu Chan*
Affiliation:
Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong
Frank Leung-Yuk Lam
Affiliation:
Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong
*
a)Address all correspondence to these authors. e-mail: hyung@hku.hk
b)e-mail: hrsccky@hku.hk
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Abstract

When supported by suitable metal oxides such as ceria, platinum often displays increased catalytic activity and selectivity. A chemical vapor infiltration technique was used to impregnate Pt nanoparticles into an ordered mesoporous gadolinium-doped ceria (OMG), which was templated from KIT-6 silica. High Pt loading, up to 38 vol% of OMG, was achieved. This synthesis method is highly scalable and offers easy control over catalyst–support geometry. A detailed study of the OMG structure was conducted by controlling the synthesis parameters of the KIT-6 silica template. Formation mechanism and thermal stability of the OMG/Pt–OMG composite were also studied. The mesostructure composites were found to sustain until 750 and 650 °C, respectively. The highly structural composite holds the promise of increased activity, selectivity, and stability for applications in heterogeneous catalysis.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 6 , 28 March 2013 , pp. 863 - 872
Copyright
Copyright © Materials Research Society 2013

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References

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