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Characterization of Antimony-Doped TIN Oxide Catalysts

Published online by Cambridge University Press:  02 July 2020

K. Sun ,
J. Liu  and
N.D. Browning
K. Sun
Affiliation:
Department of Physics, University of Illinois at Chicago, ChicagoIL60607-7059;
J. Liu
Affiliation:
Monsanto Company, 800 N. Lindbergh Blvd., U1E St. Louis, Missouri 63167
N.D. Browning
Affiliation:
Department of Physics, University of Illinois at Chicago, ChicagoIL60607-7059;
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Abstract

Antimony-doped tin oxide (ATO) catalysts are used for the oxidation of propylene to acrolein, the ammoxidation of propylene to acrylonitrile and the oxidative dehydrogenation of butanes to 1,3- butadiene. The distribution and valence states of Sb in ATOs are key in determining their catalytic activities. While these materials have been subjects of intensive studies for more than 20 years, X-ray photoelectron spectroscopy, Mössbauer spectrometry, and X-ray absorption spectroscopy4 have so far provided only indirect data for the distribution of Sb and its valence states. in particular, while has been hypothesized that the tin (IV) oxide contains Sb (V) within the bulk lattice and Sb (III) located at surface sites, no direct experimental evidence for this has been provided.

Here we use electron energy loss spectroscopy (EELS) combined with Z-contrast imaging in a JEOL 2010F field emission STEM/TEM operating at 200 KV to analyze ATO catalysts.

Type
Characterization of Catalysts (Organized by S. Bradley)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 1094 - 1095
Copyright
Copyright © Microscopy Society of America 2001

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References

references

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7. This research was supported by Monsanto Company. The help of Nicholls, A. W., Ito, Y., and Klie, R. F. is gratefully acknowledged.Google Scholar