Skip to main content
SpringerLink
Log in

Dynamic states of V‐oxide species: reducibility and performance for methane oxidation on V2O5/SiO2 catalysts as a function of coverage

  • Published:
Catalysis Letters Aims and scope Submit manuscript

Abstract

Temperature‐programmed in situ Raman spectroscopy is used to understand the effect of surface vanadia coverage on the structure, reducibility and performance for the oxidation of methane on V2O5/SiO2 catalysts. The vanadia coverage on silica has no effect on its structure below its dispersion‐limit loading (“monolayer” coverage); however, the interactions among surface vanadia species under reducing conditions become increasingly important. This interaction appears to operate through the sharing of oxygen sites facilitating the reduction, but it does not alter the total reducibility. The probability for this interaction to take place increases with vanadium oxide surface coverage. It is therefore expected that under reaction conditions the catalyst with higher vanadia coverage would have a greater capacity to release oxygen. This would increase the activity per vanadium site.

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. N.R. Foster, Appl. Catal. 19 (1985) 1.

    Article  CAS  Google Scholar 

  2. M.J. Brown and N.D. Parkyns, Catal. Today 8 (1981) 305.

    Article  Google Scholar 

  3. T.R. Baldwin, R. Burch, G.D. Squire and S.C. Tsang, Appl. Catal. 74 (1991) 137.

    Article  CAS  Google Scholar 

  4. C.S. Walker, J.A. Lapszewicz and G.A. Foulds, Catal. Today 21 (1994) 519.

    Article  Google Scholar 

  5. S. Irusta, E.A. Lombardo and E.E. Miró, Catal. Lett. 24 (1994) 339.

    Article  Google Scholar 

  6. F. Martín-Jiménez, J.M. Blasco, L.J. Alemany, M.A. Bañares, M. Faraldos, M.A. Peña and J.L.G. Fierro, Catal. Lett. 33 (1995) 279.

    Article  Google Scholar 

  7. M.A. Bañares, L.J. Alemany, M. López Granados, M. Faraldos and J.L.G. Fierro, Catal. Today 33 (1997) 73.

    Article  Google Scholar 

  8. M.S. Faraldos, M.A. Bañares, J.A. Anderson, I.E. Wachs and J.L.G. Fierro, J. Catal. 160 (1996) 214.

    Article  CAS  Google Scholar 

  9. N. Das, H. Eckerdt, H. Hu, I.E. Wachs, J.F. Walzer and F.J. Faher, J. Phys. Chem. 97 (1993) 8240.

    Article  CAS  Google Scholar 

  10. Q. Sun, J.-M. Jehng, H. Hu, R.G. Herman, I.E. Wachs and K. Klier, J. Catal. 165 (1997) 91.

    Article  CAS  Google Scholar 

  11. J.H. Cardoso, M.A. Bañares, J.M. Correa-Bueno and J.L.G. Fierro, Collect. Czech. Chem. Commun. 63 (1998) 1743.

    Article  CAS  Google Scholar 

  12. M.M. Koranne, J.G. Goodwin and G. Marcelin, J. Catal. 148 (1994) 369.

    Article  CAS  Google Scholar 

  13. H. Knözinger and E. Taglauer, Catalysis 10 (1993) 1.

    Google Scholar 

  14. C.B. Wang, Y. Cai and I.E. Wachs, Langmuir 15 (1999) 1223.

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

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

    M.A. Bañares & J.L.G. Fierro

  2. Departamento de Engenharia Química, UFSCAR, São Carlos, São Paulo, Brazil

    J.H. Cardoso & J.M. Correa‐Bueno

  3. Instituto de Ciencia de Materiales, CSIC, Campus UAM‐Cantoblanco, E‐28049, Madrid, Spain

    F. Agulló‐Rueda

Authors
  1. M.A. Bañares
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J.H. Cardoso
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. F. Agulló‐Rueda
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. J.M. Correa‐Bueno
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. J.L.G. Fierro
    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

Bañares, M., Cardoso, J., Agulló‐Rueda, F. et al. Dynamic states of V‐oxide species: reducibility and performance for methane oxidation on V2O5/SiO2 catalysts as a function of coverage. Catalysis Letters 64, 191–196 (2000). https://doi.org/10.1023/A:1019043205270

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1019043205270

Search

Navigation