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Pretreatment effects and NO x decomposition on alumina supported Rh/MoO3 catalysts

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Abstract

Rh-MoO3/Al2O3, Rh/Al2O3 and MoO3/Al2O3 catalysts have been prepared and subjected to various pretreatments including high temperature reduction, high temperature oxidation and oxidation/ reduction cycles. After each series of treatments, surfaces were analysed by XPS and FTIR of adsorbed NO. The effectiveness of these surfaces in dissociating NO was studied by TPRS in the temperature range 300–773 K. Reduction rates of Mo oxides in H2 were determined gravimetrically while rhodium dispersion was determined from H2 adsorption isotherms at 298 K. Results indicate that molybdenum and rhodium exist in close contact in both oxidised and reduced forms. H2 chemisorption was suppressed following HTR of the catalyst due to coverage of rhodium by molybdenum oxide species but this could be reversed by HTO (773 K) followed by low temperature reduction. Although a small proportion of Mo could be reduced following HTR, cycles of HTR/HTO produced Rh/Mo oxide phases in which a proportion of Mo could be reduced to Mo° at 473 K. The presence of reduced Mo would appear to play an important role in the improved performance of Rh-MoO3/Al2O3 catalysts.

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References

  1. K.C. Taylor, in:Catalysis - Science and Technology, Vol. 5, eds. J.R. Anderson and M. Boudart (Springer, Berlin, 1984) p. 120.

    Google Scholar 

  2. H.C. Yao, H.S. Gandhi and M. Shelef, in:Metal-Additive Effects in Catalysis, ed. B. Imelik (Elsevier, Amsterdam, 1982) p. 158.

    Google Scholar 

  3. J.E. de Vries, H.C. Yao, R.J. Baird and H.S. Gandhi, J. Catal. 84 (1983) 8.

    Google Scholar 

  4. J.-G. Kim, J.Z. Shyu and J.R. Regalbuto, J. Catal. 139 (1993) 153.

    Google Scholar 

  5. I. Halasz, A. Brenner and M. Shelef, Appl. Catal. B 2 (1993) 131.

    Google Scholar 

  6. I. Halasz, A. Brenner and M. Shelef, Catal. Lett. 18 (1993 289.

    Google Scholar 

  7. H.S. Gandhi, H.C. Yao and H.K. Stepien, in:Catalysis Under Transient Conditions, ACS Symposium Series No. 178, eds. AT. Bell and L. Hegedus (American Chemical Society, Washington, 1982) p. 143.

    Google Scholar 

  8. M.D. Wardinsky and W.C. Henker, J. Phys. Chem.0 92 (1988) 2602.

    Google Scholar 

  9. W.C. Hecker, M.D. Wardinsky, P.C. Clemmer and R.B. Breneman, in:Proc. 9th Int. Congr. on Catalysis, eds. M.J. Phillips and M. Ternan (Chem. Inst. Canada, Ontario, 1988) p. 1106.

    Google Scholar 

  10. B.J. Kip, E.G.F. Hermans, J.H.M.C. van Wolput, N.M.A. Hermans, J. van Grondelle and R. Prins, Appl. Catal. 35 (1987) 109.

    Google Scholar 

  11. E.C. DeCanio and D.A. Storm, J. Catal. 132 (1991) 375.

    Google Scholar 

  12. E. Guglielminotti, E. Giamello, F. Pinna, G. Strukul, S. Martinengo and L. Zanderighi, in:Proc. 10th Int. Congr. on Catalysis, eds. L. Guczi, F. Solymosi and P. Tétényi (Akadémiai Kiadó, Budapest, 1993) p. 2761.

    Google Scholar 

  13. K. Kunimori, T. Wakasugi, F. Yamakawa, H. Oyanagi, J. Nakamura and T. Uchijima, Catal. Lett. 9 (1991) 331.

    Google Scholar 

  14. K. Kunimori, H. Oyanagi, H. Shindo, T. Ishigako and T. Uchijima, in:Proc. 10th Int. Congr. on Catalysis, eds. L. Guczi, F. Solymosi and P. Tðényi (Akadémiai Kiadó, Budapest, 1993) p. 2039.

    Google Scholar 

  15. C.D. Wagner, W.M. Riggs, L.E. Davis, J.F. Moulder and G.E. Muilenberg, eds.,Handbook of X-Ray Photoelectron Spectroscopy (Perkin Elmer Corporation, Minnesota, 1979) p. 104.

    Google Scholar 

  16. E.A. Hyde, R. Rudham and C.H. Rochester, J. Chem. Soc. Faraday Trans. 180 (1984) 531.

    Google Scholar 

  17. F. Solymosi and J. Sárkány, Appl. Surf. Sci. 3 (1979) 68.

    Google Scholar 

  18. J.A. Anderson, G.J. Millar and C.H. Rochester, J. Chem. Soc. Faraday Trans. 86 (1990) 571.

    Google Scholar 

  19. W.S. Millman and W.K. Hall, J. Phys. Chem. 83 (1979) 427;

    Google Scholar 

  20. J.B. Peri, J. PHys. Chem. 86 (1982) 1615.

    Google Scholar 

  21. T. Iizuka, M. Itoh, H. Hattori and K. Tanabe, J. Chem. Soc. Faraday Trans. 178 (1982) 501.

    Google Scholar 

  22. H.C. Yao and Rothchild, in:4th Int. Conf. Chem. and Uses of Molybdenum, eds. H.F. Barry and P.C.H. Mitchell (Climax Molybdenum Co., Ann Arbor, 1982) p. 31.

    Google Scholar 

  23. H.J. Jung, J.L. Schmitt and H. Ando, in:4th Int. Conf. Chem. and Uses of Molybdenum, eds. H.F. Barry and P.C.H. Mitchell (Climax Molybdenum Co., Ann Arbor, 1982) p. 246.

    Google Scholar 

  24. H.C. Yao, J. Catal. 70 (1981) 440.

    Google Scholar 

  25. F.P.J.M. Kerkhof and J.A. Moulijn, J. Phys. Chem. 83 (1979) 1612.

    Google Scholar 

  26. T.W. Root, G.B. Fisher and L.B. Schmidt, J. Chem. Phys. 85 (1986) 4679.

    Google Scholar 

  27. C.V. Cáceres, J.L.G. Fierro, J. Lázaro, A. López Agudo and J. Soria, J. Catal. 122 (1990) 113.

    Google Scholar 

  28. J. Valyon, M. Henker and K.-P. Wendlandt, React. Kinet. Catal. Lett. 38 (1989) 265.

    Google Scholar 

  29. H.C. Foley, A.J. Hong, J.S. Brinen, L.F. Allard and A.J. Garret-Reed, Appl. Catal. 61 (1990) 351.

    Google Scholar 

  30. J.-P. Badaud, J.-P. Fournier and J. Omaly, Compt. Rend. Acad. Sci. C 284 (1977) 921.

    Google Scholar 

  31. W.K. Hall and M. Lo Jacono, in:Proc. 6th Int. Congr. on Catalysis, eds. G.C. Bond, P.B. Wells and F.C. Tompkins (Chem. Soc., London, 1977) p. 246.

    Google Scholar 

  32. N.K. Pande and A.T. Bell, J. Catal. 98 (1986) 7.

    Google Scholar 

  33. S.H. Oh, J. Catal. 124 (1990) 477.

    Google Scholar 

  34. H.C. Yao, Y.Y. Yao and K. Otto, J. Catal. 56 (1979) 21.

    Google Scholar 

  35. C.J. Casewit and A.K. Rappé, J. Catal. 89 (1984) 250.

    Google Scholar 

  36. J.S. Villarubia and W. Ho, J. Chem. Phys. 87 (1987) 1.

    Google Scholar 

  37. N.K. Pande and A.T. Bell, J. Catal. 97 (1986) 137.

    Google Scholar 

  38. E.I. Altman and R.J. Gorte, J. Catal. 113 (1988) 185.

    Google Scholar 

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Authors and Affiliations

  1. Instituto de Catálisis y Petroleoquímica, CSIC, UAM, Cantoblanco, 28049, Madrid, Spain

    J. A. Anderson & J. L. G. Fierro

  2. Departamento de Química Inorgánica, UNED, Senda del Rey, s/n, 28028, Madrid, Spain

    A. Guerrero-Ruiz

Authors
  1. J. A. Anderson
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  2. A. Guerrero-Ruiz
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  3. J. L. G. Fierro
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Anderson, J.A., Guerrero-Ruiz, A. & Fierro, J.L.G. Pretreatment effects and NO x decomposition on alumina supported Rh/MoO3 catalysts. Top Catal 1, 123–136 (1994). https://doi.org/10.1007/BF01379582

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