PL EN


Preferences help
enabled [disable] Abstract
Number of results
2008 | 114 | S | S-29-S-47
Article title

The Response of Work Function οf Thin Metal Films to Interaction with Hydrogen

Content
Title variants
Languages of publication
EN
Abstracts
EN
The aim of this paper is to summarize the results of experiments carried out at our laboratory on the response of the work function of several thin films of transition metals and rare earth metals to interaction with molecular hydrogen. The main focus concerns the description of surface phenomena accompanying the reaction of hydride formation as a result of the adsorbate's incorporation into the bulk of the thin films. Work function changes Δ Φp caused by adsorption and reaction concern the surface, hence this experimental method is appropriate for solving the aforementioned problem. A differentiation is made between the work function changes ΔΦp due to creation of specific adsorption states characteristic of hydrides, and ΔΦp arising as a result of surface defects and protrusions induced in the course of the reaction. The topography of thin metal films and thin hydride films with defects and protrusions was illustrated by means of atomic force microscopy. For comparison, the paper discusses work function changes caused by H_2 interaction with thin films of metals which do not form hydrides (for example platinum), or when this interaction is performed under conditions excluding hydride formation for thermodynamic reasons. Almost complete diminishing of ΔΦp was observed, in spite of significant hydrogen uptake on some rare earth metals, caused by formation of the ordered H-Y-H surface phase.
Keywords
EN
Contributors
author
  • Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
author
  • Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
author
  • Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
References
  • 1. Y. Fukai, The Metal-Hydrogen System, Springer-Verlag, Berlin 1993
  • 2. M. Tkacz, J. Chem. Phys. 108, 2084 (1998)
  • 3. R. Duś, E. Nowicka, Z. Wolfram, Surf. Sci. 216, 1 (1989)
  • 4. B. Baranowski, Physica B 265, 16 (1999)
  • 5. R.C. Brouwer, R. Griessen, Phys. Rev. Lett. 62, 1760 (1989)
  • 6. F.J.A. den Broeder, S.J. van der Molen, M. Kremers, J.N. Huibertus, D.G. Nagengast, A.T. van Gogh, W.H. Huisman, N.J. Koeman, B. Dam, J.H. Rector, S. Plota, M. Haaksama, R.M. Jungblut, P.A. Duine, R. Grissen, Nature 394, 656 (1998)
  • 7. T.B. Grimley, in: Chemisorption, Ed. W.E. Garner, Butterworth, London 1957, p. 17
  • 8. R. Duś, E. Nowicka, Langmuir 12, 1520 (1996)
  • 9. E. Nowicka, R. Duś, Langmuir 12, 1520 (1997)
  • 10. R. Duś, E. Nowicka, Z. Wolfram, Langmuir 14, 5487 (1998)
  • 11. R. Duś, Surf. Sci. 52, 440 (1975)
  • 12. R. Duś, R. Nowakowski, E. Nowicka, J. Alloys Comp. 404/406, 284 (2005)
  • 13. T. Delchar, A. Eberhagen, F.C. Tompkins, J. Sci. Instrum. 40, 105 (1963)
  • 14. E. Nowicka, R. Duś, Surf. Sci. 144, 665 (1984)
  • 15. A. Bachtin, Vacuum 12, 519 (1985)
  • 16. G.C. Bond, Catalysis by Metals, Academic Press, London 1962
  • 17. J.C.P. Mignolet, J. Chim. Phys. 17, 333 (1957)
  • 18. R. Duś, F.C. Tompkins, J. Chem. Soc. Faraday Trans. I 71, 930 (1975)
  • 19. R. Duś, E. Nowicka, Prog. Surf. Sci. 67, 139 (2001)
  • 20. K. Christmann, G. Ertl, Surf. Sci. 60, 365 (1976)
  • 21. J. Anzelm, Surf. Sci. 108, 561 (1981)
  • 22. G. Wedler, Chemisorption: an Experimental Approach, Butterworths, London 1976
  • 23. R. Duś, W. Lisowski, Surf. Sci. 59, 141 (1976)
  • 24. E. Nowicka, Z. Wolfram, R. Duś, Surf. Sci. 247, 248 (1991)
  • 25. H. Friske, E. Wicke, Ber. Bunsenges. Phys. Chem. 77, 48 (1973)
  • 26. J. Ross MacDonald, C.A. Barlow, J. Chem. Phys. 39, 412 (1963)
  • 27. E. Nowicka, R. Duś, J. Alloys Comp. 253-254, 506 (1997)
  • 28. P. Vajda, in: Handbook of the Physics and Chemistry of Rare Earth, Vol. 20, Ch. 137, Eds. K.A. Geseider, L. Eiring, Elsevier, Amsterdam 1995, p. 220
  • 29. R. Duś, E. Nowicka, Langmuir 16, 584 (2000)
  • 30. R. Nowakowski, E. Nowicka, R. Duś, Appl. Surf. Sci. 254, 4346 (2008)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv114ns03kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.