Abstract
The study revealed additional channels of inelastic electron scattering, which accompany the threshold excitation of the substrate Pt4d level — ionization of the valent states of adsorbed particles chemically bonded to the excited atom, and excitation of the surface plasmon vibrations. The conjugate excitation of this type shows up as a series of typical satellites in the spectra of disappearance potentials, which reflects the structure of valent states of adsorbed particles. Analysis of the satellite structure revealed the intermediate formation of NH x,ads particles in the reaction NOgas + Hads on the surface of Pt(100) single crystal and, taking into account the earlier data, made it possible to formulate a general mechanism of selfoscillations in the NO + H2 reaction on platinum metals. Mathematical modeling of reaction kinetics on the Pt(100) surface within the suggested mechanism demonstrated the presence of regular self-oscillations of the reaction rate at invariable values of the step constants.
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Original Russian Text Copyright © 2011 by A. R. Cholach, N. N. Bulgakov, and V. M. Tapilin
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Translated from Zhurnal Strukturnoi Khimii, Vol. 52, Supplement, pp. S19–S26, 2011.
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Cholach, A.R., Bulgakov, N.N. & Tapilin, V.M. Inelastic electron scattering in the adsorbed system. J Struct Chem 52 (Suppl 1), 13–20 (2011). https://doi.org/10.1134/S002247661107002X
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DOI: https://doi.org/10.1134/S002247661107002X