Catalysis Letters

, Volume 29, Issue 1–2, pp 159–168 | Cite as

Surface characterization of palladium-copper bimetallic catalysts by FTIR spectroscopy and test reactions

  • Frantisek Skoda
  • Marcel P. Astier
  • Gérard M. Pajonk
  • Michel Primet
Article

Abstract

Different bi-metallic palladium-copper catalysts have been prepared according to different sequences of impregnation of a commercial alumina. CO adsorption followed by FTIR spectroscopy was performed in order to identify the nature of the superficial sites. Two test reactions were also used to characterize the nature of the active surface site: gas phase toluene hydrogenation was selected in order to show the hydrogenating activity of metallic palladium, whereas the reaction of decomposition of ethanol, which exhibits 100% selectivity in the formation of ethanal on pure copper catalysts, was also studied on this series of catalysts. The results obtained by both methods are complementary. By comparison with the behaviour of pure palladium or copper based catalysts, they allow to propose hypotheses on the surface composition: separated phases, alloys or a phase covered by the other one.

Keywords

Pd-Cu bimetallics CO adsorption FTIR toluene hydrogénation ethanol decomposition 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    M.V. Rahaman and M.A. Vannice, J. Catal. 127 (1991) 251.Google Scholar
  2. [2]
    C.A. Leon, Y. Leon and M.A. Vannice, Appl. Catal. 69 (1991) 305.Google Scholar
  3. [3]
    J. Bandiera and P. Meriaudeau, React. Kinet. Catal. Lett. 37 (1988) 373.Google Scholar
  4. [4]
    Ch. Sivaraj and P. Kantarao, Appl. Catal. 45 (1988).Google Scholar
  5. [5]
    N. Kanoun, M.P. Astier and G.M. Pajonk, Appl. Catal. 70 (1991) 225.Google Scholar
  6. [6]
    F. Skoda, M.P. Astier, G.M. Pajonk and M. Primet, to be published.Google Scholar
  7. [7]
    N. Sheppard and T.T. Nguyen, in:Advances in Infrared and Roman Spectroscopy, Vol. 5, eds. R.J.H. Clark and R.E. Chester (Heyden, London, 1978) p. 67.Google Scholar
  8. [8]
    J.L. Duplan and H. Praliaud, Appl. Catal. 67 (1991) 325.Google Scholar
  9. [9a]
    A.M. Bradshaw and F.M. Hoffmann, Surf. Sci. 52 (1975) 449; 72 (1978) 513;Google Scholar
  10. [9b]
    A. Ortega, F.M. Hoffmann and A.M. Bradshaw, Surf. Sci. 119 (1982) 79.Google Scholar
  11. [10]
    A.A. Davydov, in:Infrared Spectroscopy of Adsorbed Species on the Surface of Transition Metal Oxides, ed. C. H. Rochester (Wiley, New York, 1990).Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • Frantisek Skoda
    • 1
  • Marcel P. Astier
    • 1
  • Gérard M. Pajonk
    • 1
  • Michel Primet
    • 1
  1. 1.Laboratoire d'Application de la Chimie à l'Environnement (LACE)Unité Mixte de Recherche CNRS-Université Claude BernardVilleurbanne CédexFrance

Personalised recommendations