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Hydrogenation of Benzonitrile on Sn-Pt/SiO2 Catalysts Prepared by Introducing SnEt4 to Pt/SiO2: Role of Tin

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Abstract

Liquid phase hydrogenation of benzonitrile was studied over Sn-Pt/SiO2 catalysts prepared by introducing tetraethyl tin onto the 3 wt.% Pt/SiO2 catalyst. Tin content of the catalysts ranged from 0.05 to 0.63 wt.%, whereas Sn/Pt surface atomic ratios determined by chemisorption measurements were between 0.1 to 3.5. Dibenzylamine selectivity influenced to a small extent by the level of conversion and the Sn/Pt ratio wasca. 75 %. The addition of tin to Pt in the range of (Sn/Pt)surface = 0.50–1.25 led to an increase in the turnover frequency (TOF) by a factor of 2. TOF showed a maximum at a surface atomic ratio of Sn/Pt = 1. The enhancement of catalyst activity upon the addition of tin is explained by the formation of Snδ+-Pt ensemble sites on the surface of bimetallic nanoclusters. It is suggested that highly dispersed positively charged tin species, by polarizing the triple bond, enhance the reactivity of the -CN group. Calcination at 300°C followed by re-reduction of the catalysts resulted in a monotonic decrease of specific activity with increasing Sn/Pt ratio.

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REFERENCES

  1. J. Sinfelt: Bimetallic Catalysts: Discovery, Concepts and Applications, Wiley, New York 1983.

    Google Scholar 

  2. J.L. Margitfalvi, I. Borbáth, E. Tfirst, A. Tompos: Catal. Today, 43, 29 (1998).

    Google Scholar 

  3. J.P. Candy, F. Humblot, B. Didillon, F. LePeltier, J.M. Basset: Stud. Surf. Sci. Catal., 126, 237 (1999).

    Google Scholar 

  4. J.L. Margitfalvi, I. Borbáth, M. Hegedüs, E. Tfirst, S. Göbölös,: K. Lázár: J. Catal., 196, 200 (2000).

    Google Scholar 

  5. S. Galvano, A. Donato, G. Neri, R. Pietropaolo: J. Mol. Catal., 58, 215 (1990).

    Google Scholar 

  6. A. Tompos, I. Borbáth, M. Hegedüs, S. Göbölös, J.L. Margitfalvi, to be published.

  7. A.E. Mansour, J.P. Candy, J.P. Bournonville, O.A. Ferretti, J.M. Basset: Angew. Chem. Int. Ed. Engl., 28, 347 (1989).

    Google Scholar 

  8. O.P. Savateev, M.V. Klyuev, Yu.G. Erykalov: Izv. Vyssh. Ucheb. Zaved., Khim. Khim. Tekhnol., 30, 33 (1987).

    Google Scholar 

  9. M. Besson, J.M. Bonnier, M. Joucla: Bull. Soc. Chim. Fr., 127, 5 (1990).

    Google Scholar 

  10. Z. Poltarzewski, S. Galvagno, R. Pietropaolo, P. Staiti: J. Catal., 102, 190 (1986).

    Google Scholar 

  11. S. Galvagno, Z. Potarzewski, A. Donato, G. Neri, R. Pietropaolo: J. Mol. Catal., 35, 365 (1986).

    Google Scholar 

  12. S. Galvagno, A. Donato, G. Neri, R. Pietropaolo, Z. Poltarzewski: J. Mol. Catal., 42, 379 (1987).

    Google Scholar 

  13. G. Cocco, S. Enzo, S. Galvagno, Z. Poltarzewski, R. Pietropaolo: J. Chem. Soc., Farad. Trans. I, 81, 321 (1985).

    Google Scholar 

  14. Galvagno, H.S. Minro, R. Pietropaolo, Z. Poltarzewski, A. Recca: Gazz. Chim. Ital., 111, 265 (1986).

    Google Scholar 

  15. G.D. Yadav, M.R. Kharkara: Appl. Catal. A, 126, 115 (1995).

    Google Scholar 

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Authors and Affiliations

  1. Institute of Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, H-1025, Budapest, Pusztaszeri út, 59-67, Hungary

    Sándor Gőbölös, Nagen Mahata, Irina Borbáth, Mihály Hegedűs & József L. Margitfalvi

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  1. Sándor Gőbölös
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  2. Nagen Mahata
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  3. Irina Borbáth
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  4. Mihály Hegedűs
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  5. József L. Margitfalvi
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Gőbölös, S., Mahata, N., Borbáth, I. et al. Hydrogenation of Benzonitrile on Sn-Pt/SiO2 Catalysts Prepared by Introducing SnEt4 to Pt/SiO2: Role of Tin. Reaction Kinetics and Catalysis Letters 74, 345–352 (2001). https://doi.org/10.1023/A:1017957715767

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