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Adsorption of hydrogen on nickel single crystal surfaces

J. Chem. Phys. 60, 4528 (1974); doi:10.1063/1.1680935

Issue Date: 1 June 1974

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K. Christmann, O. Schober, G. Ertl, and M. Neumann
Physikalisch-Chemisches Institut der Universität, München, Germany
Adsorption of hydrogen on Ni(111), (100), and (110) surfaces was studied by means of LEED; energy loss spectroscopy, flash desorption, and work function measurements, as well as by the technique of laser-induced thermal desorption. Noticeable variations of the LEED intensities for Ni(111) and (100) indicate the formation of disordered adsorbed layers, whereas with Ni(110) the formation of ``streaked'' diffraction patterns and (at high coverages) of a 1×2 structure were observed. Hydrogen adsorption causes a strong damping of the intensity of the surface plasmon excitation and the appearance of an electron loss peak around 15 eV. Flash desorption experiments revealed for Ni(111) and Ni(100) the existence of beta1 and beta2 states, the former being only filled after completion of the beta2 state. Desorption from the beta2 state follows a second-order rate law for Ni(111) and Ni(100), but is of first order with Ni(110). Maximum increases of the work function Delta[cursive phi] by 0.195, 0.170, and 0.530 eV were observed with Ni(111), (100), and (110), respectively. Adsorption isotherms Delta[cursive phi]=f(pH2) for Ni(111) and Ni(100) may be closely described up to medium coverages on the basis of a model that assumes second-order desorption and first-order adsorption kinetics. The validity of this model was further proved by measurements of the variation of coverage with time. The adsorption isotherms for Ni(110) have a unique shape indicating the occurrence of two-dimensional condensation due to attractive interactions in the adsorbed layer. Isosteric heats of adsorption at low coverages of 23 kcal/mole for Ni(111) and Ni(100) and of 21.5 kcal/mole for Ni(110) were evaluated. With Ni(110) the onset of condensation is characterized by an increase of Ead by about 2 kcal/mole. A steplike decrease of Ead at medium coverages accompanies the formation of the beta1 states. ©1974 American Institute of Physics
History: Received 27 November 1973
Permalink: http://link.aip.org/link/?JCPSA6/60/4528/1
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ISSN:
0021-9606 (print)   1089-7690 (online)
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REFERENCES (68)
View in Separate Window/Tab
  1. For a review of results prior to 1969 see, for example, G. Wedler, Adsorption (Verlag Chemie, Weinheim, 1970).
  2. D. D. Eley and P. R. Norton, Proc. R. Soc. A 314, 319 (1970).
  3. R. P. Gasser, K. Roberts, and A. J. Stevens, Trans. Faraday Soc. 65, 3105 (1969); [ChemPort]
    4. Surface Sci. 20, 123 (1970). [ISI] [ChemPort]
  4. W. P. Gilbreath and D. E. Wilson, J. Vac. Sci. Technol. 8, 45 (1971). [ISI]
  5. H. Saltsburg, J. N. Smith, and R. L. Palmer, in The Structure and Chemistry of Solid Surfaces, edited by G. A. Somorjai (Wiley, New York, 1969), p. 42.
  6. N. Taylor and R. Creasy, in Adsorption-Desorption Phenomena, edited by F. Ricca (Academic, New York, 1972), p. 297.
  7. A. M. Horgan and D. A. King, in Ref. 6, p. 329.
  8. E. K. Rideal and F. Sweett, Proc. R. Soc. A 252, 291 (1960).
  9. J. Völter and M. Procop, Z. Phys. Chem. (Leipzig) 249, 344 (1972); [Inspec] [ChemPort]
    10. 253, 33 (1973). [Inspec] [ChemPort]
  10. G. Wedler, H. Reichenberger, and H. Wenzel, Z. Naturforsch. 26a, 1452 (1971). [Inspec] [ChemPort]
  11. G. Wedler, G. Fisch, and H. Papp, Ber. Bunsenges. 74, 186 (1970).
  12. G. Wedler, F. J. Bröcker, G. Fisch, and G. Schroll, Z. Phys. Chem. (Frank. a. M.) 76, 212 (1971).
  13. G. Wedler and G. Fisch, Ber. Bunsenges. 76, 1160 (1972).
  14. G. Wedler and G. Santelmann, Ber. Bunsenges. 75, 1026 (1971).
  15. G. Wedler and F. J. Bröcker, Z. Phys. Chem. (Frank. a.M.) 75, 299 (1971).
  16. L. H. Germer, E. J. Scheibner, and C. D. Hartman, Phil. Mag. 5, 222 (1960).
  17. L. H. Germer and J. W. May, in The Structure and Chemistry of Solid Surfaces, edited by G. A. Somorjai (Wiley, New York, 1969), p. 51-1.
  18. L. H. Germer and A. U. MacRae, J. Chem. Phys. 37, 1382 (1962).
  19. D. Lichtman, F. N. Simon, and T. R. Kirst, Surface Sci. 9, 325 (1968); [ChemPort]
    20. 12, 299 (1968). [Inspec] [ChemPort]
  20. T. N. Taylor and P. J. Estrup, J. Vac. Sci. Technol. 11, 244 (1974). [ISI]
  21. R. Wortman, R. Gomer, and R. Lundy, J. Chem. Phys. 27, 1099 (1957). [ISI]
  22. H. E. Farnsworth, R. E. Schlier, and J. Tuul, J. Chem. Phys. Solids 9, 57 (1959).
  23. G. Ertl and D. Küppers, Ber. Bunsenges. 75, 1017 (1971).
  24. J. Lapujoulade and K. S. Neil, J. Chem. Phys. 57, 3535 (1972). [ISI] [ChemPort]
  25. J. Lapujoulade and K. S. Neil, Surface Sci. 35, 288 (1973). [Inspec] [ISI] [ChemPort]
  26. J. Lapujoulade and K. S. Neil, J. Chem. Phys. 70, 797 (1973).
  27. J. C. Tracy, J. Chem. Phys. 56, 2748 (1972). [ISI] [ChemPort]
  28. H. H. Madden and G. Ertl, Surf. Sci. 35, 211 (1973). [Inspec] [ISI] [ChemPort]
  29. K. Christmann, O. Schober, and G. Ertl, J. Chem. Phys. (to be published).
  30. H. H. Madden, J. Küppers, and G. Ertl, J. Chem. Phys. 58, 3401 (1973). [ISI]
  31. K. Christmann, G. Ertl, and O. Schober, Surface Sci. 40, 61 (1973). [Inspec] [ISI] [ChemPort]
  32. G. Ertl and M. Neumann (unpublished).
    33. A preliminary report has been given in Z. Naturforsch. 27a, 1607 (1972). [Inspec] [ChemPort]
  33. T. C. Ngoc, M. G. Lagally, and M. B. Webb, Surface Sci. 35, 117 (1973). [Inspec]
  34. J. E. Demuth and T. N. Rhodin, Surface Sci. 42, 261 (1974). [Inspec]
  35. G. E. Laramore, Phys. Rev. B 8, 515 (1973). [Inspec]
  36. P. J. Jennings and E. G. McRae, Surface Sci. 23, 363 (1970). [Inspec]
  37. L. H. Germer, Surface Sci. 5, 147 (1966). [Inspec] [ChemPort]
  38. E. Bauer, Surface Sci. 5, 152 (1966). [ChemPort]
  39. S. Andersson and B. Kasemo, Surface Sci. 25, 273 (1971). [Inspec] [ChemPort]
  40. J. Küppers, Surface Sci. 36, 53 (1973). [Inspec] [ChemPort]
  41. B. Heimann and J. Hölzl, Z. Naturforsch. 27a, 408 (1972). [Inspec] [ChemPort]
  42. D. Menzel and R. Gomer, J. Chem. Phys. 41, 3311, 3329, (1964);
    43. P. A. Redhead, Can. J. Phys. 42, 886 (1964). [ISI] [ChemPort]
  43. G. Ehrlich, Adv. Catalysis 14, 255 (1963). [ChemPort]
  44. P. A. Redhead, Vacuum, 12, 203 (1962).
  45. R. Suhrmann, R. Gerdes, and G. Wedler, Z. Naturforsch. 18a, 1208 (1963).
  46. O. Schober, thesis, Hannover, 1973.
  47. S. Glasstone, K. J. Laidler, and H. Eyring, The Theory of Rate Processes (McGraw-Hill, New York, 1941), p. 339.
  48. T. A. Delchar and F. C. Tompkins, Trans. Faraday Soc. 64, 1915 (1968). [Inspec]
  49. W. A. Crossland and J. Pritchard, Surface Sci. 2, 217 (1964). [ChemPort]
  50. H. Rinne, thesis, Hannover, 1974.
  51. H. Conrad, G. Ertl, and E. E. Latta (unpublished).
  52. G. Comsa, A. Gelberg, and B. Josifescu, Phys. Rev. 122, 1091 (1961). [ChemPort]
  53. D. T. Pierce and W. E. Spicer, Phys. Rev. Lett. 25, 581 (1970). [ISI]
  54. J. C. Tracy, J. Chem. Phys. 56, 2736 (1972). [ISI] [ChemPort]
  55. J. C. Tracy and P. W. Palmberg, Surface Sci. 14, 274 (1969). [ISI] [ChemPort]
  56. J. H. de Boer, The Dynamical Character of Adsorption (Clarendon, Oxford, 1953);
    57. J. M. Honig, The Solid-Gas Interface (Dekker, New York, 1967), Vol. 1, p. 371 ff.
  57. T. L. Hill, J. Chem. Phys. 14, 441 (1946). [ISI] [ChemPort]
  58. H. Conrad, G. Ertl, and E. E. Latta, Surface Sci. 41, 435 (1974). [Inspec] [ISI]
  59. P. J. Estrup and J. Anderson, J. Chem. Phys. 45, 2254 (1966); [ISI]
    60. K. Yonehara and L. D. Schmidt, Surface Sci. 25, 238 (1971); [Inspec] [ISI] [ChemPort]
    P. W. Tamm and L. D. Schmidt, J. Chem. Phys. 51, 5352 (1969); [ISI] [ChemPort]
    52, 1150 (1970); [ISI] [ChemPort]
    J. T. Yates and T. E. Madey, ibid. 54, 4969 (1971). [ISI] [ChemPort]
  60. T. Madey, Surface Sci. 38, 281 (1973).
  61. E. W. Plummer and A. E. Bell, J. Vac. Sci. Technol. 9, 583 (1972). [ISI]
  62. T. Toya, J. Vac. Sci. Technol. 9, 890 (1972). [ISI]
  63. T. B. Grimley, Proc. Phys. Soc. Lond. 90, 751 (1967); [ChemPort]
    64. T. B. Grimley and S. Walker, Surface Sci. 14, 395 (1969); [Inspec]
    T. E. Einstein and J. R. Schrieffer, Phys. Rev. B 7, 3629 (1973). [Inspec]
  64. T. B. Grimley and M. Torrini, J. Phys. C 6, 868 (1973). [ISI]
  65. R. B. McQuistan, S. J. Lichtman, J. Vac. Sci. Technol. 10, 890 (1973). [ISI]
  66. H. Brodowsky, Z. Phys. Chem. (N.F.) 44, 129 (1965); [ChemPort]
    67. M. v. Stackelberg and P. Ludwig, Z. Naturforsch. 19, 93 (1964).
  67. D. J. M. Fassaert, H. Verbeek, and A. v. d. Avoird, Surface Sci. 29, 501 (1972). [Inspec] [ChemPort]
  68. H. Conrad, G. Ertl, J. Koch, and E. E. Latta, Surface Sci. (to be published).

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