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Journal of Materials Science

, Volume 30, Issue 19, pp 4834–4838 | Cite as

Redox behaviour of copper mordenite zeolite

  • M. M. Mohamed
  • E. F. Vansant
Article

Abstract

Fourier transform-infrared photoacoustic spectroscopy (FT-IR/PAS) and X-ray diffraction (XRD) techniques have been used to study the reduction of copper (II) oxide supported on mordenite zeolite, through the adsorption of carbon monoxide and hydrogen gases at 723 K. It was found that bands due to the bridged hydroxyl groups (3614–3630 cm−1) and the Al-OH groups (3780–3787cm−1) show significant changes upon carbon monoxide and hydrogen adsorption whereas the Si-OH band did not change after the adsorption. Two further bands were detected at 2156 and 2297 cm−1, assigned to carbon monoxide adsorbed on Cu+ species and on the copper-aluminate species, respectively. XRD patterns have demonstrated the proposed interaction between Cu2+ with aluminium mordenite, to form aluminate, whereas FT-IR spectra have established an interaction between carbon monoxide molecules and the aluminate species.

Keywords

Copper Hydroxyl Zeolite Carbon Monoxide Hydrogen Adsorption 
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.
    B. Coughlan andM. A. Kaene,J. Chem. Soc. Farad. Trans,1 86 (1990) 1007.CrossRefGoogle Scholar
  2. 2.
    Idem,,Can. J. Chem. 68 (1990) 1417.CrossRefGoogle Scholar
  3. 3.
    J. B. Uytterhoeven,Acta Phys. Chem. 24 (1978) 53.Google Scholar
  4. 4.
    W. Romanovski,Rocz. Chem. 45 (1971) 427.Google Scholar
  5. 5.
    K. H. Bager, F. Vogt andH. Bremer,A.C.S. Symp. Ser. 40 (1976) 528.Google Scholar
  6. 6.
    Idem,,Z. Chem. 14 (1974) 200.Google Scholar
  7. 7.
    M. Mokhtar Mohamed,Thermochim. Acta 230 (1993) 167.CrossRefGoogle Scholar
  8. 8.
    Idem, J. Catal. submitted.Google Scholar
  9. 9.
    A. Dyer, “An Introduction To Zeolite Molecular Sieves” (Wiley, New York, 1988).Google Scholar
  10. 10.
    M. Mokhtar Mohamed,Spectrochim. Acta A, (1994)51 1 (1995) 1.CrossRefGoogle Scholar
  11. 11.
    E. M. Flanigen, H. Khatami andH. A. Szymanskis,Adv. Chem. Ser. 101 (1971) 201.CrossRefGoogle Scholar
  12. 12.
    J. V. Sanders,Zeolites 5 (1985) 81.CrossRefGoogle Scholar
  13. 13.
    J. Philippaerts, PhD thesis, University of Antwerp (1989).Google Scholar
  14. 14.
    M. M. Mohamed, C. Vanhoof andE. F. Vansant, in “Proceedings of the International Workshop in FTIR Spectroscopy” (Antwerp, 1990) p. 361.Google Scholar
  15. 15.
    K. Nakamoto, “Infrared and Raman Spectra of Inorganic and Coordination Compounds” Wiley, New York, 1986.Google Scholar
  16. 16.
    J. T. Richardson “Principles of Catalyst Development” (New York, Plenum Press, 1989) p. 113.CrossRefGoogle Scholar
  17. 17.
    Y-Yang Huang,J. Am. Chem. Soc. 95 (1973) 6636.CrossRefGoogle Scholar
  18. 18.
    D. Kember andN. Sheppard,Appl. Spectrosc. 29 (1975) 496.CrossRefGoogle Scholar
  19. 19.
    H. A. B. Hayon, J. Guidot andD. Barthomeuf,J. Chem. Soc. Farad. I 75 (1979) 2366.CrossRefGoogle Scholar
  20. 20.
    P. J. J. De Hulsters, PhD thesis, Antwerp (1990).Google Scholar
  21. 21.
    B. Reoerstorf andS. L. Anderson,J. Chem. Soc. Farad. Trans. 86 (1990) 3153.CrossRefGoogle Scholar
  22. 22.
    M. C. Marion, E. Garbowski andM. Primet,ibid. 86 (1990) 3027.CrossRefGoogle Scholar
  23. 23.
    Y. Okamoto andT. Imanaka,J. Phys. Chem. 92 (1988) 7102.CrossRefGoogle Scholar
  24. 24.
    A. K. Ghosh andG. Curthoys,J. Chem. Soc. Farad. Trans. 179 (1983) 805.CrossRefGoogle Scholar
  25. 25.
    G. Lambert andI. Eysel, J.C.P.D.S. Grant in Aid Report (1980) ASTM 33 6 448.Google Scholar
  26. 26.
    J. O. Petunchi andW. K. Hall,J. Catal 80 (1983) 403.CrossRefGoogle Scholar
  27. 27.
    J. L. Schlenker, J. J. Pluth andJ. V. Smith,Mater. Res. Bull. 13 (1978) 77.CrossRefGoogle Scholar
  28. 28.
    Idem, ibid. B (1978) 169.CrossRefGoogle Scholar
  29. 29.
    Idem, ibid. 13 (1978) 901.CrossRefGoogle Scholar
  30. 30.
    W. J. Mortier J. Phys. Chem. 81 (1977) 1334.CrossRefGoogle Scholar
  31. 31.
    J. T. Miller, P. D. Hopkins, B. L. Heyers, G. J. Ray, R. T. Roginski, G. W. Zajac andN. H. Rosenbaum,J. Catal. 138 (1992) 115.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • M. M. Mohamed
    • 1
  • E. F. Vansant
    • 2
  1. 1.Faculty of Science, Department of ChemistryAl-Azhar UniversityNaser City, CairoEgypt
  2. 2.Chemistry DepartmentUniversity of AntwerpWilrijkBelgium

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