Coincident thermal desorption and salt formation in CO+K coadsorbed layers

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Coadsorption of CO and K on metal surfaces leads to a mutual stabilization of both species and to their coincident thermal desorption. It is shown that the coincident desorption temperatures vary significantly with the nature of the metals and it increases in the sequence Cu-Pd-Ni-Ru-Pt-Rh-Fe: the difference between the lowest and highest value is about 239 K. It is concluded that neither salt formation nor the dissociation of CO, and hence the formation of a stable K-O species, could account for these features. It is proposed that a K8+-COδ surface complex is formed between CO and potassium which strongly interacts with the underlying metal. The stability of the complex on the surface is primarily determined by the bond strength of the CO with the host metal perturbed by potassium.

Original languageEnglish
Pages (from-to)361-370
Number of pages10
JournalSurface Science
Volume201
Issue number1-2
DOIs
Publication statusPublished - 1988

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Thermal desorption
Carbon Monoxide
Salts
desorption
salts
Metals
potassium
metals
Potassium
metal surfaces
stabilization
dissociation
Desorption
Stabilization
temperature
Temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Coincident thermal desorption and salt formation in CO+K coadsorbed layers. / Solymosi, F.; Berkó, A.

In: Surface Science, Vol. 201, No. 1-2, 1988, p. 361-370.

Research output: Contribution to journalArticle

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