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SSIMS and XPS Studies of Reconstruction of Alumina-Supported Rh Particles

Author

Listed:
  • I. Stará

    (SERMEC, Case 261, Faculté des Sciences et Techniques de Saint-Jérôme, 13397 Marseille Cedex 20, France)

  • J.-P. Di Salvo

    (SERMEC, Case 261, Faculté des Sciences et Techniques de Saint-Jérôme, 13397 Marseille Cedex 20, France)

  • V. Nehasil

    (SERMEC, Case 261, Faculté des Sciences et Techniques de Saint-Jérôme, 13397 Marseille Cedex 20, France)

  • V. Matolín

    (SERMEC, Case 261, Faculté des Sciences et Techniques de Saint-Jérôme, 13397 Marseille Cedex 20, France)

  • E. Gillet

    (SERMEC, Case 261, Faculté des Sciences et Techniques de Saint-Jérôme, 13397 Marseille Cedex 20, France)

Abstract

Rhodium particles were vapor-deposited on (-1012) α-alumina and polycrystalline γ-alumina substrates. Variations of morphological parameters during the growth and/or thermal annealing in vacuum, oxygen and CO atmosphere have been investigated by means of static SIMS and XPS. The ratios of Rh/substrate ion species and the Rh 3d electron binding energy variations indicated changes in metal coverage given by particle size and dispersion variations. The heating of as-deposited particles in vacuum led to the particle coalescence. On the other hand the oxygen interactions with particles gave an increase of particle dispersion.

Suggested Citation

  • I. Stará & J.-P. Di Salvo & V. Nehasil & V. Matolín & E. Gillet, 1998. "SSIMS and XPS Studies of Reconstruction of Alumina-Supported Rh Particles," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 5(01), pages 375-379.
    • Handle: RePEc:wsi:srlxxx:v:05:y:1998:i:01:n:s0218625x98000694
    DOI: 10.1142/S0218625X98000694
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