The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics

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dc.identifier.uri http://dx.doi.org/10.15488/2774
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2800
dc.contributor.author Pfnür, Herbert
dc.contributor.author Menzel, D.
dc.date.accessioned 2018-02-19T14:09:39Z
dc.date.available 2018-02-19T14:09:39Z
dc.date.issued 1983
dc.identifier.citation Pfnür, H.; Menzel, D.: The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics. In: Journal of Chemical Physics 79 (1983), 2400. DOI: https://doi.org/10.1063/1.446047
dc.description.abstract After careful calibration, the work function change induced by CO adsorption on Ru(001) has been used to measure the sticking coefficient s as functions of sample temperature (between 100 and 400 K) and coverage, with the gas temperature always at about 295 K. The main results are: At θ=0, the sticking coefficient is independent of sample temperature between 100 and 400 K, at s0=0.7 for 0<θ<0.2. s drops proportional to (1–θ) for Ts≳200 K, and more gradually below 200 K; at 100 K, s drops slowly up to θ=0.5. Above θ=0.23 a sharp decrease of s sets in for Ts≳120 K; a second plateau becomes obvious around θ∼0.35 for Ts<360 K. Close to saturation, s drops to below 10−2. These results are discussed in terms of a precursor model with strong effects of the chemisorbed layer on the properties of the precursor. A critical evaluation of the formal precursor states involved suggests that classical precursor states exist only at appreciable coverage and are defined by the lateral and vertical interactions, while at low coverage the collisional dynamics are determined for sticking of molecules. eng
dc.language.iso eng
dc.publisher College Park, MD : American Institute of Physics
dc.relation.ispartofseries Journal of Chemical Physics 79 (1983)
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
dc.subject CO adsorption eng
dc.subject chemisorption eng
dc.subject precursor model eng
dc.subject.ddc 530 | Physik ger
dc.title The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics eng
dc.type article
dc.type Text
dc.relation.issn 00219606
dc.relation.doi https://doi.org/10.1063/1.446047
dc.bibliographicCitation.issue 5
dc.bibliographicCitation.volume 79
dc.bibliographicCitation.firstPage 2400
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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