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An EXAFS Study of a Highly Dispersed Rh/Al2O3 Catalyst

  • D. C. Koningsberger
  • T. Huizinga
  • H. F. J. van’t Blik
  • J. B. A. D. van Zon
  • R. Prins
  • D. E. Sayers
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 27)

Abstract

The X-ray absorption spectrum of the Rh K-edge of a highly dispersed reduced Rh/Al2O3 catalyst shows EXAFS oscillations due to Rhodium-Rhodium nearest neighbors. Adsorption of CO at room temperature on the reduced catalyst significantly decreases the amplitude of the EXAFS oscillations. This implies that CO adsorption on very small metal crystallites leads to a disruption of a significant number of the Rhodium-Rhodium metallic bonds.

These results show that the Rh in this system is not monatomically dispersed but is in the form of very small crystallites whose structure is disrupted by the adsorption of CO.

Keywords

EXAFS Spectrum Hydrogen Chemisorption EXAFS Study Rhodium Atom Chemisorption Measurement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    D.J.C. Yates, L.L. Murrell and E.B. Prestridge, J. Catal., 37 (1980) 975.Google Scholar
  2. 2.
    J.T. Yates, T.M. Duncan, S.D. Worley and R.W. Vaughan, J. Chem. Phys., 70 (1979) 1219.ADSCrossRefGoogle Scholar
  3. 3.
    R.R. Cavanagh and J.T. Yates, J. Chem. Phys. 74 (1981) 4150.ADSCrossRefGoogle Scholar
  4. 4.
    D.C. Koningsberger and J.W. Cook Jr. (see Proceedings of this Conference).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1983

Authors and Affiliations

  • D. C. Koningsberger
    • 1
  • T. Huizinga
    • 1
  • H. F. J. van’t Blik
    • 1
  • J. B. A. D. van Zon
    • 1
  • R. Prins
    • 1
  • D. E. Sayers
    • 1
    • 2
  1. 1.Laboratory for Inorganic Chemistry and CatalysisEindhoven University of TechnologyEindhovenThe Netherlands
  2. 2.Department of PhysicsNorth Carolina State University RaleighUSA

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