English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The available experimental and theoretical evidence for vibrational excitation of the adlayer in CO chemisorption on metal surfaces raises the question on the validity of the generally accepted model of 'precursor-mediated' adsorption in the presence of adsorption–stimulated desorption ( asd ) as triggered by the hyperthermal conditions of the adlayer. The analysis shows that a 'precursor-mediated' kinetics still describes the  total  rate of adsorption, but that sticking probability measurements carried out in the presence of  asd  might actually measure the  net  adsorption rate, that is a lower sticking probability. Literature data, on the decrease of the sticking probability at increasing energies of the impinging CO molecular beams, have tentatively been interpreted by assuming an enhancement of the desorption rate caused by the energy transfer from the beam. The analysis is supported by a theoretical kinetic model of 'precursor- mediated' adsorption which takes into account, explicitly, the vibrational excitation of the adspecies.

Role of Vibrational Excitation of the Adlayer in 'Precursor-Mediated' Sticking Probabilities of CO on Metal Surfaces: A Kinetic Model