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Interaction of hydrogen with nitrogen atoms chemisorbed on a Ru(0001) surface

J. Chem. Phys. 102, 1432 (1995); doi:10.1063/1.468930

Issue Date: 15 January 1995

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H. Shi, K. Jacobi, and G. Ertl
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
In order to investigate microscopic steps of ammonia synthesis on Ru surfaces, hydrogen adsorption on a Ru(0001) surface, precovered by atomic nitrogen, has been studied using high-resolution electron energy loss spectroscopy (HREELS) and thermal desorption spectroscopy (TDS). Hydrogen adsorption has been performed with the Ru sample at 90 and 300 K. At 90 K, the saturation coverage of hydrogen decreases with increasing N precoverage. The vibrational properties of H do not change much in the presence of N compared to those on the bare Ru(0001) surface exhibiting one single mode at 85 meV for small H coverages and losses at 99 and 141 meV at H saturation. Heating of the H+N coadsorbed layer from 90 to 300 K does not result in any observable N–H bond formation. After exposure of N/Ru(0001) to H2 at room temperature, however, NH3 and NH species are observed on the surface. NH3 is characterized by its symmetric bending mode deltas at 145 meV. The reaction intermediate NH is stable up to 400 K and shows losses of nu(Ru-NH), delta(N–H), and nu(N–H) at 86, 166, and 410 meV, respectively. A barrier height of 93 kJ/mol is estimated for the NH3 synthesis reaction from N and H. In the presence of some coadsorbed Cs, NHx species are not observed at 300 K indicating a destabilization of NHx by Cs. ©1995 American Institute of Physics.
History: Received 6 September 1994; accepted 13 October 1994
Permalink: http://link.aip.org/link/?JCPSA6/102/1432/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.65.My
    Physical chemistry Surface and interface chemistry Chemisorption
  • 82.20.Hf
    Physical chemistry Chemical kinetics Mechanisms and product distribution
  • 82.80.Pv
    Physical chemistry Chemical analysis and related physical methods of analysis Electron spectroscopy for chemical analysis (photoelectron, Auger spectroscopy, etc.)
  • 82.80.Ch
    Physical chemistry Chemical analysis and related physical methods of analysis Ultraviolet, visible, infrared, Raman, microwave, and magnetic resonance spectroscopic analysis methods; spectrophotometry; colorimetry
  • YEAR: 1995

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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REFERENCES (44)
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  1. A. Ozaki and K. Aika, in Catalysis—Science and Technology, edited by J. R. Anderson and M. Boudart (Springer, Berlin, 1981), Vol. 1, p. 87.
  2. G. Ertl, in Catalytic Ammonia Synthesis, edited by J. R. Jennings (Plenum, New York, 1991), p. 109.
  3. M. Boudart and J. K. Nørskov, Catal. Lett. (in press).
  4. S. R. Tennison, in Catalytic Ammonia Synthesis, edited by J. R. Jennings (Plenum, New York, 1991), p. 303.
  5. K. Aika, Angew. Chem. Int. Ed. Engl. 25, 558 (1986).
  6. S. Uchiyama, Y. Hattori, A. Ozaki, and K. Aika, Chem. Lett. 1981, 1463.
  7. G. C. Bond, in The Physical Basis for Heterogeneous Catalysis, edited by E. Drauglis and R. I. Jaffee (Plenum, New York, 1975), p. 33.
  8. A. Ozaki, K. Aika, and H. Hori, Bull. Chem. Soc. Jpn. 44, 3216 (1971).
  9. L. R. Danielson, M. J. Dresser, E. E. Donaldson, and J. T. Dickinson, Surf. Sci. 71, 599 (1978).
  10. L. R. Danielson, M. J. Dresser, E. E. Donaldson, and D. R. Sandstrom, Surf. Sci. 71, 615 (1978).
  11. C. Benndorf and T. E. Madey, Surf. Sci. 135, 164 (1983).
  12. C. Benndorf and T. E. Madey, Chem. Phys. Lett. 101, 59 (1983).
  13. C. Egawa, T. Nishida, S. Naito, and K. Tamaru, J. Chem. Soc. Faraday Trans. 1 80, 1595 (1984).
  14. C. Egawa, S. Naito, and K. Tamaru, Surf. Sci. 138, 279 (1984).
  15. W. Tsai and W. H. Weinberg, J. Phys. Chem. 91, 5302 (1987).
  16. J. E. Parmeter, Y. Wang, C. B. Mullins, and W. H. Weinberg, J. Chem. Phys. 88, 5225 (1988).
  17. Y. Zhou, S. Akhter, and J. E. White, Surf. Sci. 202, 357 (1988).
  18. T. Sasaki, T. Aruga, H. Kuroda, and Y. Iwasawa, Surf. Sci. 224, L969 (1989);
    19. 240, 223 (1990).
  19. Y. Zhou, Z. M. Liu, and J. M. White, Surf. Sci. 230, 85 (1990).
  20. Y.-K. Sun, Y.-Q. Wang, C. B. Mullins, and W. H. Weinberg, Langmuir 7, 1689 (1991).
  21. J. A. Rodriguez, W. K. Kuhn, C. M. Truong, and D. W. Goodman, Surf. Sci. 271, 333 (1992).
  22. T. Matsushima, Surf. Sci. 197, L287 (1988).
  23. J. E. Parmeter, U. Schwalke, and W. H. Weinberg, J. Am. Chem. Soc. 110, 53 (1988).
  24. H. Rauscher, K. L. Kostov, and D. Menzel, Chem. Phys. 177, 473 (1993).
  25. H. Shi, K. Jacobi, and G. Ertl, J. Chem. Phys. 99, 9248 (1993).
  26. J. A. Schwarz, Surf. Sci. 87, 525 (1979).
  27. (a) M. Kiskinova and D. W. Goodman, Surf. Sci. 108, 64 (1981);
    28. (b) S. Johnson and R. J. Madix, ibid. 108, 77 (1981).
  28. M. Kiskinova and D. W. Goodman, Surf. Sci. 109, L555 (1981).
  29. G. Ertl, M. Huber, S. B. Lee, Z. Paal, and M. Weiss, Appl. Surf. Sci. 8, 373 (1981).
  30. W. Tsai, J. J. Vajo, and W. H. Weinberg, J. Phys. Chem. 92, 1245 (1988).
  31. M. Gruyters and K. Jacobi, J. Electron. Spectrosc. Relat. Phenom. 64/65, 591 (1993).
  32. H. Shi, K. Jacobi, and G. Ertl, Surf. Sci. 269/270, 682 (1992).
  33. P. Feulner and D. Menzel, Surf. Sci. 154, 465 (1985).
  34. M. A. Barteau, J. Q. Broughton, and D. Menzel, Surf. Sci. 133, 443 (1983).
  35. H. Conrad, R. Scala, W. Stenzel, and R. Unwin, J. Chem. Phys. 81, 6371 (1984).
  36. H. Shi and K. Jacobi, Surf. Sci. 313, 289 (1994).
  37. J. L. Gland, G. B. Fisher, and G. E. Mitchell, Chem. Phys. Lett. 119, 89 (1985).
  38. I. C. Bassignana, K. Wagemann, J. Küppers, and G. Ertl, Surf. Sci. 175, 22 (1986).
  39. R. P. Cheney and J. N. Armor, Inorg. Chem. 16, 3338 (1977).
  40. K. Jacobi, H. Shi, M. Gruyters, and G. Ertl, Phys. Rev. B 49, 5733 (1994).
  41. H. Shi, P. Geng, and K. Jacobi, Surf. Sci. 315, 1 (1994).
  42. J. Trost, J. Wintterlin, and G. Ertl (to be published).
  43. M. Sokolowski, T. Koch, and H. Pfnür, Surf. Sci. 243, 261 (1991).
  44. M. Drechsler, H. Hoinkes, H. Kaarmann, H. Wilsch, G. Ertl, and M. Weiss, Appl. Surf. Sci. 3, 217 (1979).

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