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Flame-made Ceria Nanoparticles

Published online by Cambridge University Press:  31 January 2011

L. Mädler ,
W. J. Stark  and
S. E. Pratsinis
L. Mädler
Affiliation:
Institute of Process Engineering, ETH Zürich, CH-8092 Zürich, Switzerland
W. J. Stark
Affiliation:
Institute of Process Engineering, ETH Zürich, CH-8092 Zürich, Switzerland
S. E. Pratsinis*
Affiliation:
Institute of Process Engineering, ETH Zürich, CH-8092 Zürich, Switzerland
*
a)Address all correspondence to this author. e-mail: pratsinis@ivuk.mavt.ethz.ch
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Abstract

Flame spray pyrolysis (FSP) has been used to synthesize high-surface-area ceria from cerium acetate in acetic acid solution. With the addition of an iso-octane/2-butanol mixture to that solution, homogeneous CeO2 nanoparticles were obtained. The specific surface area of the powders ranged from 240 to 101 m2/g by controlling the oxygen dispersion and liquid precursor flow rates through the flame. Furthermore, for production rates from 2 to 10 g/h a constant average primary particle size could be obtained at selected process parameters. The ceria showed high crystallinity and primary particles with a stepped surface. The powder exhibited good thermal stability and conserved up to 40% of its initial specific surface area when calcinated for 2 h at 900 °C. This shows the potential of FSP made ceria for high-temperature applications as in three-way catalysts or fuel cells.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 6 , June 2002 , pp. 1356 - 1362
Copyright
Copyright © Materials Research Society 2002

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