Palladium particles growth on various aluminas

  • P. Légaré
  • F. Finck
  • R. Roche
  • G. Maire


Pd was deposited from a filament onto an α-Al2O3 single-crystal. The Pd 3dP 5/2 binding energy change versus deposition time was used as a calibration of the Pd clusters size. The experiment was then reproduced on γ — Al2O3. The Pd 3d 5/2 binding energy showed that the clusters growth mechanism was now different. Thermal treatments produced a dispersion of the metal or a clusters size increase depending on the temperature or the nature of the support. Oxygen exposure dispersed Pd in every case. A mechanism is proposed to interpret this phenomenon.




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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • P. Légaré
    • 1
  • F. Finck
    • 1
  • R. Roche
    • 2
  • G. Maire
    • 1
  1. 1.Laboratoire de Catalyse et Chimie des surfacesUniversité Louis PasteurStrasbourg CedexFrance
  2. 2.P. S. A. Etudes et RecherchesLa GarenneFrance

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