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High-Resolution TEM Characterization of Carbon Aerogels as Catalyst Supports

Published online by Cambridge University Press:  01 February 2011

Dafei Kang ,
Ying Zhang ,
Carl Saquing ,
Can Erkey  and
Mark Aindow
Dafei Kang
Affiliation:
Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, U-3136, 97 N. Eagleville Rd., Storrs, CT 06269–3136.
Ying Zhang
Affiliation:
Department of Chemical Engineering, University of Connecticut, U-3222, 191 Auditorium Rd., Storrs, CT 06269–3222.
Carl Saquing
Affiliation:
Department of Chemical Engineering, University of Connecticut, U-3222, 191 Auditorium Rd., Storrs, CT 06269–3222.
Can Erkey
Affiliation:
Department of Chemical Engineering, University of Connecticut, U-3222, 191 Auditorium Rd., Storrs, CT 06269–3222.
Mark Aindow
Affiliation:
Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, U-3136, 97 N. Eagleville Rd., Storrs, CT 06269–3136.
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Abstract

Carbon aerogels with tailored pore sizes were prepared by using a combination of sol-gel processing, supercritical CO2 extraction and pyrolysis. Ruthenium particles were incorporated via impregnation of organometallic precursors using supercritical CO2, followed by in situ thermal reduction. TEM studies reveal that the carbon aerogels are characterized by a continuous pore structure and that the ruthenium particles are highly dispersed with a narrow size distribution. It is found that under certain circumstances the carbon aerogels undergo a structural transition under the electron beam, in which the original tortuous aerogel network transforms into onion-like structures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 800: Symposium AA – Synthesis, Characterization, and Properties of Energetic/Reactive Nanomaterials , 2003 , AA9.5
Copyright
Copyright © Materials Research Society 2004

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References

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