Abstract
Whereas NO adsorption at room temperature on activated H-ZSM-5 (Si/Al = 29) caused only negligible changes in its IR spectrum, addition on O2 to NO led to the appearance of bands at 2133 and 977 cm-1. Concomitantly, the number of acidic zeolite OH groups decreased while H2O hydrogen-bonded to zeolite OH groups developed. Introduction of small amounts of 18O2 did not change the 2133 cm-1 band wavenumber, nor the use of a partly deuteroxylated D–H-ZSM-5 sample. In such a case, HOD formation was detected. The results obtained evidence that the 2133 cm-1 band, generally considered as characterizing NO+ 2 species, is, in fact, due to NO+ species occupying cationic positions in the zeolite. The 977 cm-1 band is attributed to the Olattice–NO+ vibration. A scheme of the NO+ formation, involving NO2 molecules as NO oxidizing agent, is proposed.
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References
W. Held, A. Koenig, T. Richter and L. Puppe, SAE paper 900496 (1990).
M. Iwamoto and H. Hamada, Catal. Today 17 (1991) 94.
Y. Li, T.L. Slager and J.N. Armor, J. Catal. 150 (1994) 388.
V. Bell, J. Feeley, M. Deeba and R. Farrauto, Catal. Lett. 29 (1994) 15.
T.E. Hoost, K.A. Laframboise and K. Otto, Catal. Lett. 33 (1995) 105.
T.E. Hoost, K.A. Laframboise and K. Otto, Appl. Catal. B 7 (1995) 79.
K. Hadjiivanov, D. Klissurski, G. Ramis and G. Busca, Appl. Catal. B 7 (1996) 251.
G. Centi, A. Gally and S. Perathoner, J. Chem. Soc. Faraday Trans. 92 (1996) 5129.
T. Beutel, B. Adelman and W.M.H. Sachtler, Appl. Catal. B 9 (1996) L1.
J. Szanyi and M.T. Paffett, J. Catal. 164 (1996) 232.
A. Aylor, L. Lobree, J. Reimer and A.T. Bell, Stud. Surf. Sci. Catal. 101 (1996) 661.
A. Aylor, L. Lobree, J. Reimer and A.T. Bell, J. Catal. 170 (1997) 390.
K. Hadjiivanov, to be published.
T. Pieplu, F. Poignant, A. Vallet, J. Saussey and J.C. Lavalley, Stud. Surf. Sci. Catal. 96 (1996) 619.
B. Adelman, T. Beutel, G.D. Lei and W.M.H. Sachtler, J. Catal. 158 (1996) 327.
N.W. Hayes, R.W. Joyner and E.S. Shpiro, Appl. Catal. B 8 (1996) 343.
M. Iwamoto, H. Furukawa and S. Kagawa, in: New Developments in Zeolite Science and Technology, Proc. 7th Int. Zeolite Conf., Tokyo, 17–22 August 1986, eds. Y. Murakami, A. Lijima and J.W. Ward (Kadansha, Tokyo, and Elsevier, Amsterdam, 1986) p. 943.
V. Parvulescu, P. Grange and B. Delmon, J. Phys. Chem. 101 (1997) 6933.
A. Corma, V. Fornés and E. Palomares, Appl. Catal. B 11 (1997) 233.
C. Descorme, P. Gélin, M. Primet and C. Lécuyer, Catal. Lett. 41 (1996) 133.
W.-X. Zhang, H. Yahiro, N. Mizuno, J. Izumi and M. Iwamoto, Langmuir 9 (1993) 2337.
M. Iwamoto, H. Yahiro, N. Mizuno, W.-X. Zhang, Y. Mine, H. Furukawa and S. Kagawa, J. Phys. Chem. 96 (1992) 9360.
A. Aylor, S. Larsen, J. Reimer and A.T. Bell, J. Catal. 157 (1995) 592.
J. Valyon and W.K. Hall, Proc. 10th Int. Congr. Catal., Budapest, 19–24 July 1992 (Elsevier, Amsterdam, 1993) p. 1339.
T. Cheung, S. Bhargawa, M. Hobdat and K. Foger, J. Catal. 158 (1996) 301.
C. Chao and J. Lunsford, J. Am. Chem. Soc. 93 (1971) 71.
C. Chao and J. Lunsford, J. Am. Chem. Soc. 93 (1971) 6794.
J. Valyon and W.K. Hall, J. Phys. Chem. 97 (1993) 1204.
J. Laane and J.R. Ohlsen, Prog. Inorg. Chem. 28 (1986) 465.
K. Nakamoto, Infrared Spectra of Inorganic and Coordination Compounds (Mir, Moscow, 1966).
F.A. Cotton and G. Wilkinson, Adv. Inorg. Chem. (1980).
I. Halasz, A. Brenner, K.Y.S. Ng and Y. Hou, J. Catal. 161 (1996) 359.
M. Shelef, Chem. Rev. 95 (1995) 209.
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Hadjiivanov, K., Saussey, J., Freysz, J. et al. FT-IR study of NO + O2 co-adsorption on H-ZSM-5: re-assignment of the 2133 cm-1 band to NO+ species. Catalysis Letters 52, 103–108 (1998). https://doi.org/10.1023/A:1019059117488
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DOI: https://doi.org/10.1023/A:1019059117488