Dynamics of Ethene Adsorption on Clean and C-Contaminated Cu(410) (Articolo in rivista)

Type
Label
  • Dynamics of Ethene Adsorption on Clean and C-Contaminated Cu(410) (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Venugopal V.; Vattuone L.; Kravchuk T.; Smerieri M.; Savio L.; Jupille J.; Rocca M. (2009)
    Dynamics of Ethene Adsorption on Clean and C-Contaminated Cu(410)
    in Journal of physical chemistry. C
    (literal)
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  • Venugopal V.; Vattuone L.; Kravchuk T.; Smerieri M.; Savio L.; Jupille J.; Rocca M. (literal)
Pagina inizio
  • 20875 (literal)
Pagina fine
  • 20880 (literal)
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  • 113 (literal)
Rivista
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  • In: Journal of Physical Chemistry C, vol. 113 pp. 20875 - 20880. ACS, 2009. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNISM-Dipartimento di Fisica, Università di Genova, Italy, CNR-IMEM, Genova, Institut des Nanosciences de Paris, CNRS, Dipartimento di Fisica Genova e CNR-IMEM, Genova (literal)
Titolo
  • Dynamics of Ethene Adsorption on Clean and C-Contaminated Cu(410) (literal)
Abstract
  • As recently established (J. Am. Chem. Soc. 2008, 130, 12552), ethene adsorption on Cu(410) occurs both molecularly and dissociatively, the latter resulting in carbon contamination of the surface. Here we report on the coverage-dependent dynamics of C2H4 adsorption on clean and carbon-contaminated Cu(410). For the bare surface, the initial sticking probability has a very weak dependence on kinetic energy and is almost independent of angle of incidence. Molecular adsorption is in both cases precursor-mediated and nonactivated. Ethene dissociation takes place during adsorption as well as upon annealing. Both paths proceed via a molecular precursor. The former is translationally activated, while the latter depends strongly on the heating rate. The presence of preadsorbed carbon, resulting from previous uptakes, affects both the sticking probability and the attained saturation coverage. The latter quantity is shown to be a sensitive probe of carbon precoverage. A scheme of the complicated potential energy surface of this system is derived and discussed. (literal)
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