Skip to main content
Log in

Size effect in the oxidation–reduction processes of platinum particles supported onto silicon dioxide

  • Published:
Kinetics and Catalysis Aims and scope Submit manuscript

Abstract

The interaction of the Pt/SiO2 model catalysts as thin films on the surface of tantalum supports with a mixture of NO + O2 (1: 1) was studied by X-ray photoelectron spectroscopy. The pressure of the reaction mixture was varied from 6 to 64 mbar, and the temperature was varied from room temperature to 500°C. Two types of the catalysts, in which the Pt/Si atomic ratios were ~0.1 and ~0.3 (0.1-Pt/SiO2 and 0.3-Pt/SiO2, respectively) according to the XPS data, were studied. In 0.1-Pt/SiO2, the particles of platinum predominantly had a size from 1 to 2.5 nm; a wide Pt particle size distribution in a range from 1 to 15 nm with a maximum at ~4 nm was characteristic of 0.3-Pt/SiO2. The interaction of all of the samples with NO + O2 at room temperature led to the dissolution of oxygen atoms in the bulk of platinum metal particles. As the reaction temperature was increased, PtO x platinum oxide particles were formed: from small Pt particles in 0.1-Pt/SiO2 at 300°C and from larger particles in 0.3-Pt/SiO2 at 400–500°C. It was established that the reactivity of platinum oxide particles toward hydrogen also depended on the particle size. The small particles of platinum oxide were converted into platinum metal under the action of hydrogen (16 mbar) at 300°C. The coarse particles of PtO x in the samples of 0.3-Pt/SiO2 were reduced much more easily starting with room temperature.

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

Access this article

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. Lee, J.-H. and Kung, H.H., Catal. Lett., 1998, vol. 51, p. 1.

    Article  CAS  Google Scholar 

  2. Olsson, L. and Fridell, E., J. Catal., 2002, vol. 210, p. 340.

    Article  CAS  Google Scholar 

  3. Benard, S., Retailleau, L., Gaillard, F., Vernoux, P., and Giroir-Fendler, A., Appl. Catal., B, 2005, vol. 55, p. 11.

    Article  CAS  Google Scholar 

  4. Mulla, S.S., Chena, N., Cumaranatunge, L., Blau, G.E., Zemlyanov, D.Y., Delgass, W.N., Epling, W.S., and Ribeiro, F.H., J. Catal., 2006, vol. 241, p. 389.

    Article  CAS  Google Scholar 

  5. Villani, K., Vermandel, W., Smets, K., Liang, D., van Tendeloo, G., and Martens, J.A., Environ. Sci. Technol., 2006, vol. 40, p. 2727.

    Article  CAS  Google Scholar 

  6. Kalinkin, A.V., Sorokin, A.M., Smirnov, M.Yu., and Bukhtiyarov, V.I., Kinet. Catal., 2014, vol. 55, no. 3, p. 354.

    Article  CAS  Google Scholar 

  7. Smirnov, M.Yu., Vovk, E.I., Kalinkin, A.V., Pashis, A.V., and Bukhtiyarov, V.I., Kinet. Catal., 2012, vol. 53, no. 1, p. 117.

    Article  CAS  Google Scholar 

  8. Smirnov, M.Yu., Kalinkin, A.V., and Bukhtiyarov, V.I., J. Struct. Chem., 2007, vol. 48, no. 6, p. 1053.

    Article  CAS  Google Scholar 

  9. Smirnov, M.Yu., Kalinkin, A.V., Pashis, A.V., Sorokin, A.M., Noskov, A.S., Bukhtiyarov, V.I., Kharas, K.S., and Rodkin, M.A., Kinet. Catal., 2003, vol. 44, no. 4, p. 575.

    Article  CAS  Google Scholar 

  10. Smirnov, M.Yu., Kalinkin, A.V., Pashis, A.V., Sorokin, A.M., Noskov, A.S., Kharas, K.C., and Bukhtiyarov, V.I., J. Phys. Chem. B, 2005, vol. 109, p. 11712.

    Article  CAS  Google Scholar 

  11. Moulder, J.F., Stickle, W.F., Sobol, P.E., and Bomben, K.D., Handbook of X-Ray Photoelectron Spectroscopy, Eden Prairie, Minn.: PerkinElmer, 1992.

    Google Scholar 

  12. Mason, M.G., Phys. Rev. B: Condens. Matter, 1983, vol. 27, p. 748.

    Article  CAS  Google Scholar 

  13. Hufner, S. and Wertheim, G.K., Phys. Rev. B: Condens. Matter, 1975, vol. 11, p. 678.

    Article  Google Scholar 

  14. Stakheev, A.Yu., Shulga, Yu.M., Gaidai, N.A., Telegina, N.S., Tkachenko, O.P., Kustov, L.M., and Minachev, K.M., Mendeleev Commun., 2001, vol. 5, p. 165.

    Google Scholar 

  15. Kaushik, V.K., Z. Phys. Chem., 1991, vol. 173, p. 105.

    Article  CAS  Google Scholar 

  16. Silvestre, A.J., Sepúlveda, E.A., Rodríguez, R.F., and Anderson, J.A., J. Catal., 2004, vol. 223, p. 179.

    Article  Google Scholar 

  17. Zafeiratos, S., Papakonstantinou, G., Jacksic, M.M., and Neophytides, S.G., J. Catal., 2005, vol. 232, p. 127.

    Article  CAS  Google Scholar 

  18. Huang, C.H., Wang, I.K., Lin, Y.M., Tseng, Y.H., and Lu, C.M., J. Mol. Catal. A: Chem., 2010, vol. 316, p. 163.

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to M. Yu. Smirnov.

Additional information

Original Russian Text © M.Yu. Smirnov, A.V. Kalinkin, E.I. Vovk, V.I. Bukhtiyarov, 2015, published in Kinetika i Kataliz, 2015, Vol. 56, No. 6, pp. 791–799.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Smirnov, M.Y., Kalinkin, A.V., Vovk, E.I. et al. Size effect in the oxidation–reduction processes of platinum particles supported onto silicon dioxide. Kinet Catal 56, 801–809 (2015). https://doi.org/10.1134/S0023158415060129

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S0023158415060129

Keywords

Navigation