Skip to main content
SpringerLink
Log in

Temperature-programmed reduction. Metal-support interaction on supported monometallic Ru and Cu Catalysts

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

Ru and Cu samples supported on SiO2, Al2O3 and MgO were studied by the temperature-programmed reduction (TPR) technique. Experiments were carried out both on unreduced impregnated salts and after oxidation of already reduced samples.

The TPR profiles were found to be strongly dependent on the support used, indicating different degrees of interaction between the metal and the support, which can be ranked as MgO≫Al2O3>SiO2. It is suggested that the interaction occurs through the formation of surface complexes difficult to reduce. The decrease in hydrogen consumption observed on the Ru samples with the number of TPR cycles is attributed to the difficulty in oxidizing large Ru particles.

Zusammenfassung

Auf SiO2, Al2O3 und MgO aufgebrachte Ru- und Cu-Proben wurden mittels temperaturprogrammierter Reduktion (TPR) untersucht. Experimente wurden sowohl an unreduzierten Salzimprägnierungen als auch nach Oxydation von bereits reduzierten Proben ausgeführt. Die TPR-Profile sind stark vom benutzten Trägen abhängig, was auf unterschiedliche Grade der Wechselwirkung zwischen Metall und Träger hindeutet; die Reihenfolge ist MgO≫Al2O3>SiO2. Es wird vermutet, daß das Wesen der Wechselwirkung in der Bildung von schwer reduzierbaren Oberflächenkomplexen zu suchen ist. Die bei Ru-Proben mit der Zahl der TPR-Zyklen beobachtete Verminderung des Wasserstoffverbrauchs wird mit der Schwierigkeit, große Ru-Partikel zu oxydieren, in Zusammenhang gebracht.

Резюме

Методом температурн о-программируемого восстановления (ТПВ) и зучены образцы меда и рутения на подл ожках из SiO2, Аl2О3 и MgO. Эксперимента были пр оведены как с невосстановленными импрегнированными о бразцами, так и с окисленными, но пре дварительно подвергнутих восста новлению, образцами. Н айдено, что профили ТПВ сильно за висят от используемой подлож ки, показывая тем самы м различные степени взаимодейст вия между металлом и подложкой в следующей последов ательности MgO≫ Al2O3>SiO2. Предположено, что такие взаимодейс твия протекают с обра зованием на поверхности комплек сов, трудно подвергающихся восс тановлению. Наблюдае мое в случае образцов рутения уме ньшение расхода водорода от ч исла циклов ТПВ, объяс нено трудностью окислени я больших частиц рутения.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. G. R. Tauszik, F. Garbassi and A. Marzi, Gazz. Chim. It., 110 (1980) 443.

    Google Scholar 

  2. A. Bossi, A. Catalani, F. Garbassi, G. Petrini and L. Zanderighi, J. Thermal Anal., 26 (1983) 81.

    Google Scholar 

  3. R. Berte, A. Bossi, F. Garbassi and G. Petrini, Proceeding of 7th Int. Conference on Thermal Analysis, Kingston 1982, p. 1224.

  4. P. G. J. Koopman, A. P. G. Kieboom and H. van Bekkum, J. Catal., 69 (1981) 172.

    Google Scholar 

  5. N. H. Hurst, S. J. Gentry and A. Jones, Catal. Rev., 24 (2) (1982) 233.

    Google Scholar 

  6. M. Shimokawabe, N. Takezawa and H. Kobayashi, Bull. Chem. Jpn., 56 (1983) 1337.

    Google Scholar 

  7. S. J. Gentry, N. W. Hurst and A. Jones, J. Chem. Soc. Faraday Trans. I, 77 (1981) 603.

    Google Scholar 

  8. E. G. Derouane, J. J. Chludzinski and R. T. K. Baker, J. Catal., 85 (1984) 187.

    Google Scholar 

  9. F. S. Delk II and A. Vavere, J. Catal., 85 (1984) 380.

    Google Scholar 

  10. R. M. Friedman, J. J. Freeman and F. W. Lytle, J. Catal., 55 (1978) 10.

    Google Scholar 

  11. V. C. F. Holm and A. Clark, J. Catal., 11 (1968) 305.

    Google Scholar 

  12. G. Blanchard, H. Charcosset, M. T. Chenebaux and M. Primet, Proc. 2nd Int. Symp. on Scientific Bases for the Preparation of Heterog. Catalysts, Louvain La-Neuve, Belgium, 1978, paper N B8.

  13. G. R. Tauszik, G. Leofanti and S. Galvagno, J. Molecular Catal., 25 (1984) 357.

    Google Scholar 

  14. J. J. Verdouk, P. A. Jacobs and J. B Uytterhoeven, J. Chem. Soc. Chem. Commun. (1979) 181.

  15. J. Adamiec, S. E. Wanke, B. Tesche and U. Klengler, Proc. Int. Symposium on Metalsupport and Metal-additive effects in Catalysis, Ecully (Lyon-France), 1982, p. 77.

  16. S. J. Tauster, L. L. Murrel and J. P. De Luca, J. Catal., 48 (1977) 258.

    Google Scholar 

  17. Handbook of Chemistry and Physic, ed. R. C. Weast, The Chemical Rubber Co. Ohio (USA), 1968.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Istituto Cnr-Tae, Via S. Lucia, 39, Pistunina-Messina, Italy

    S. Galvagno

  2. Dipartimento di Scienze Chimiche - Laboratorio di Petrolchimica, Università di Catania, V.Le A. Doria 6, Catania, Italy

    C. Crisafulli, R. Maggiore & A. Giannetto

  3. Montedipe, Centro Ricerche Bollate, Via S. Pietro, 50, Bollate-Milano, Italy

    G. R. Tauszik

Authors
  1. S. Galvagno
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. C. Crisafulli
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. R. Maggiore
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. G. R. Tauszik
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. A. Giannetto
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Galvagno, S., Crisafulli, C., Maggiore, R. et al. Temperature-programmed reduction. Metal-support interaction on supported monometallic Ru and Cu Catalysts. Journal of Thermal Analysis 30, 611–618 (1985). https://doi.org/10.1007/BF01913607

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01913607

Keywords

Search

Navigation