Coupled desorption and site conversion of co-adsorbates: A lattice gas analysis of thermal desorption and spectroscopic data of (NO+O)/Ru(001)

The (NO+O)/Ru(001) system constitutes a good example of complex desorption-site conversion with the advantage that the geometrical structures, the coverages, as well as detailed spectroscopic information on all participating species are available. We present a combined set of desorption data and vib...

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Veröffentlicht in:	Surface science 1999-03, Vol.424 (1), p.36-54
Hauptverfasser:	Kreuzer, H.J., Payne, S.H., Jakob, P., Menzel, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology General and physical chemistry Infrared absorption spectroscopy Models of non-equilibrium phenomena Nitrogen oxide Oxygen Ruthenium Solid-gas interface Surface kinetics Surface physical chemistry Thermal desorption
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container_title	Surface science
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creator	Kreuzer, H.J. Payne, S.H. Jakob, P. Menzel, D.
description	The (NO+O)/Ru(001) system constitutes a good example of complex desorption-site conversion with the advantage that the geometrical structures, the coverages, as well as detailed spectroscopic information on all participating species are available. We present a combined set of desorption data and vibrational spectra with in situ determination of partial coverages in desorption which show site-conversion for both increasing and decreasing temperatures. This system is understood in detail by modeling the (NO+O) coadsorbate layer on Ru(001) as a lattice gas that accounts for the adsorbate structure and site-conversion, and explains the TPD spectra. The unusual features of the TPD spectra result in part from the dramatic coverage dependence of the sticking coefficient induced by site-exclusion.
doi_str_mv	10.1016/S0039-6028(99)00010-2
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source	ScienceDirect Journals (5 years ago - present)
subjects	Chemistry Exact sciences and technology General and physical chemistry Infrared absorption spectroscopy Models of non-equilibrium phenomena Nitrogen oxide Oxygen Ruthenium Solid-gas interface Surface kinetics Surface physical chemistry Thermal desorption
title	Coupled desorption and site conversion of co-adsorbates: A lattice gas analysis of thermal desorption and spectroscopic data of (NO+O)/Ru(001)
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