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Flame-made ceria nanoparticles

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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.

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Authors and Affiliations

  1. Institute of Process Engineering, CH-8092, ETH Zürich, Zürich, Switzerland

    L. Mädler, W. J. Stark & S. E. Pratsinis

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  1. L. Mädler
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  2. W. J. Stark
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  3. S. E. Pratsinis
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Correspondence to L. Mädler.

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Mädler, L., Stark, W.J. & Pratsinis, S.E. Flame-made ceria nanoparticles. Journal of Materials Research 17, 1356–1362 (2002). https://doi.org/10.1557/JMR.2002.0202

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