Catalysis Letters

, Volume 70, Issue 1–2, pp 35–41 | Cite as

The role of lanthanum oxide on Pd‐only three‐way catalysts prepared by co‐impregnation and sequential impregnation methods

  • Do Heui Kim
  • Seong Ihl Woo
  • Jin Man Lee
  • O‐Bong Yang
Article

Abstract

The effect of lanthanum oxides on the catalytic performance and the physicochemical properties of Pd‐only three‐way catalysts prepared by co‐impregnation and sequential impregnation methods was studied by using hydrogen chemisorption, BET surface area, X‐ray diffraction and X‐ray photoelectron spectroscopy. It was found that the roles of La closely depended on the order of La introduction in the preparation of the Pd catalysts. Pd–La/Al2O3 prepared by co‐impregnation of La and Pd, kept its superior activity in spite of the significant loss of surface area of the alumina support after thermal aging at 1273 K, indicating that the primary role of La was a Pd stabilizer through the intimate interaction between La and Pd. However, on Pd/La/Al2O3, in which Pd was consecutively impregnated after the impregnation of La, La preferentially interacted with the alumina support as a form of LaxAlyO2, resulting in the stabilization of the alumina support during thermal aging. XPS results indicated that lanthanum oxide suppressed the formation of PdO interacting with alumina during thermal aging. In the case of Pd/La–Ce/Al2O3, the formation of the solid solution of (CexLa1−x)O2 was not strong enough to maintain the high activity and the good textural property after thermal aging.

Pd‐only three‐way catalyst lanthanum oxide cerium oxide co‐impregnation XPS XRD thermal aging 

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References

  1. [1]
    J.C. Summers, W.B. Williamson and M.G. Henk, SAE paper 880 281 (1988).Google Scholar
  2. [2]
    J.C. Summers and W.B. Williamson, in: Environmental Catalysis, ACS Symp. Ser., Vol. 552, ed. J.N. Armor (Am. Chem. Soc., Washington, DC, 1994) p. 94.Google Scholar
  3. [3]
    K.C. Taylor, in: Catalysis: Science and Technology, Vol. 52, eds. J.R. Anderson and M. Boudart (Springer, Berlin, 1984) p. 119.Google Scholar
  4. [4]
    H. Muraki, H. Shinjoh, H. Sobukawa, K. Yokota and Y. Fujitani, Ind. Eng. Chem. Prod. Res. Dev. 25 (1986) 202.CrossRefGoogle Scholar
  5. [5]
    M. Skoglundh, H. Johansson, L. Lowendahl, K. Jansson, L. Dahl and B. Hirschauer, Appl. Catal. B 7 (1996) 299.CrossRefGoogle Scholar
  6. [6]
    A. Lemaire, J. Massardier, H. Praliaud, G. Mabilon and M. Prigent, Stud. Surf. Sci. Catal. 96 (1995) 97.Google Scholar
  7. [7]
    J. Noh, O-B. Yang, D.H. Kim and S.I. Woo, Catal. Today 53 (1999) 575.CrossRefGoogle Scholar
  8. [8]
    D.H. Kim, S.I. Woo, J. Noh and O-B. Yang, Appl. Catal. A, in press.Google Scholar
  9. [9]
    R. Craciun and N. Dulamita, Catal. Lett. 46 (1997) 229.CrossRefGoogle Scholar
  10. [10]
    T.E. Hoost and K. Otto, Appl. Catal. A 92 (1992) 39.CrossRefGoogle Scholar
  11. [11]
    A. Trovarelli, Catal. Rev. Sci. Eng. 38 (1996) 439.Google Scholar
  12. [12]
    B.I. Whittington, C.J. Jiang and D.L. Trimm. Catal. Today 26 (1995) 41.CrossRefGoogle Scholar
  13. [13]
    A.F. Diwell, R.R. Rayaram, H.A. Shaw and T.J. Truex, Stud. Surf. Sci. Catal. 71 (1991) 139.Google Scholar
  14. [14]
    H.S. Gandhi and M. Shelef, Stud. Surf. Sci. Catal. 30 (1987) 199.CrossRefGoogle Scholar
  15. [15]
    B. Harrison, A.F. Diwell and C. Halett, Platinum Metals Rev. 32 (1988) 73.Google Scholar
  16. [16]
    M. Ozawa and M. Kimura, J. Mater. Sci. Lett. 9 (1990) 291.CrossRefGoogle Scholar
  17. [17]
    J.Z. Shyu, W.H. Weber and H.S. Gandhi, J. Phys. Chem. 92 (1988) 4964.CrossRefGoogle Scholar
  18. [18]
    G.W. Graham, P.J. Schmitz, R.K. Usmen and R.W. McCabe, Catal. Lett. 17 (1993) 175.CrossRefGoogle Scholar
  19. [19]
    M. Shelef, L.P. Haack, R.E. Soltis, J.E. deVries and E.M. Logothetis, J. Catal. 137 (1992) 114.CrossRefGoogle Scholar
  20. [20]
    L.P. Haack, J.E. deVries, K. Otto and M.S. Chatta, Appl. Catal. A 82 (1992) 199.CrossRefGoogle Scholar
  21. [21]
    C. Micheaud, P. Marecot, M. Guerin and J. Barbier, Appl. Catal. A 171 (1998) 229.CrossRefGoogle Scholar
  22. [22]
    P. Araya, C. Ferrada and J. Cortes, Catal. Lett. 35 (1995) 175.CrossRefGoogle Scholar
  23. [23]
    T.H. Fleisch, R.H. Hicks and A.T. Bell, J. Catal. 87 (1984) 398.CrossRefGoogle Scholar
  24. [24]
    J.F. Moulder, U.F. Stickle, P.E. Sobol and K.D. Bomden, in: Handbook of X-ray Photoelectron Spectroscopy (Perkin-Elmer, Eden Prairie, MN, 1992).Google Scholar
  25. [25]
    M. Bettman, R.E. Chase, K. Otto and W.H. Weber, J. Catal. 117 (1989) 447.CrossRefGoogle Scholar
  26. [26]
    B.H. Engler, D. Lindner, E.S. Lox, A. Schafer-Sindlinger and K. Ostgathe, Stud. Surf. Sci. Catal. 96 (1995) 441.Google Scholar
  27. [27]
    C. Hardcare, R.M. Ormerod and R.M. Lambert, J. Phys. Chem. 98 (1994) 10901.CrossRefGoogle Scholar
  28. [28]
    T. Miki, T. Ogawa, M. Haneda, N. Karuta, A. Ueno, S. Tateishi, S. Masuura and M. Sato, J. Phys. Chem. 94 (1990) 6464.CrossRefGoogle Scholar
  29. [29]
    K. Otto, L.P. Haack and J.E. deVries, Appl. Catal. B 1 (1992) 1.CrossRefGoogle Scholar
  30. [30]
    K.S. Kim, A.F. Gossmann and N. Winograd, Anal. Chem. 46 (1974) 197.CrossRefGoogle Scholar
  31. [31]
    R.J. Farrauto and M.C. Hobson, Appl. Catal. A 81 (1992) 227.CrossRefGoogle Scholar
  32. [32]
    Z. Karpinski, Adv. Catal. 37 (1990) 45.CrossRefGoogle Scholar
  33. [33]
    R.H. Hicks, Q.-J. Yen and A.T. Bell, J. Catal. 89 (1984) 498.CrossRefGoogle Scholar
  34. [34]
    M.J. Capitan, M.A. Centeno, P. Malet, I. Carrizosa, J.A. Odriozola, A. Marquez and J. Fernandez Sanz, J. Phys. Chem. 99 (1995) 4655.CrossRefGoogle Scholar
  35. [35]
    H.S. So, O-B. Yang, D.H. Kim and S.I. Woo, Stud. Surf. Sci. Catal. 130 (2000) 1379.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Do Heui Kim
    • 1
  • Seong Ihl Woo
    • 1
  • Jin Man Lee
    • 2
  • O‐Bong Yang
    • 2
  1. 1.Department of Chemical EngineeringKorea Advanced Institute of Science and TechnologyTaejonKorea
  2. 2.School of Chemical Engineering and TechnologyChonbuk National University, ChonjuChonbukKorea

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