Alkali-metal promotion of a dissociation precursor: N2 on Fe(111)

Whitman, L. J.; Bartosch, C. E.; Ho, W.; Strasser, G.; Grunze, M.

doi:10.1103/PhysRevLett.56.1984

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Alkali-metal promotion of a dissociation precursor: N2 on Fe(111)

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Grunze, M.
Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Whitman, L. J., Bartosch, C. E., Ho, W., Strasser, G., & Grunze, M. (1986). Alkali-metal promotion of a dissociation precursor: N2 on Fe(111). Physical Review Letters, 56(18), 1984-1987. doi:10.1103/PhysRevLett.56.1984.

Cite as: https://hdl.handle.net/21.11116/0000-0001-8426-F

Abstract

The vibrational and thermal-desorption spectra of the terminal and π-bonded adsorption states of N2 on clean and potassium-promoted Fe(111) at 74 K are reported. Submonolayer precoverages of potassium dramatically enhance the sticking coefficient of α1−N2, the π-bonded precursor to dissociation. As potassium promotion of surface reactions has been previously attributed to bond weakening in the dissociation precursor, an increase of the precursor population, with no evident bond weakening, is an important new result.