Effects of preadsorbed oxygen on the formation and decomposition of NCO on Rh(111) surfaces

F. Solymosi, A. Berkó, T. I. Tarnóczi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The interaction of HNCO with oxygen dosed Rh(111) surface has been investigated by Auger electron, electron energy loss and thermal desorption spectroscopy. The presence of adsorbed oxygen exerted no apparent influence on the weakly adsorbed HNCO (Tp = 130 K). It promoted, however, the dissociative adsorption of HNCO by forming a strong O-H bond which prevented the associative desorption of HNCO. As a result no H2 and NH3 formation occurred, in contrast with the clean surface, and the surface concentration of irreversibly bonded NCO was also increased. New products of the surface reaction were H2O and CO2, in addition to CO and N2 observed on a clean surface. From the behavior of the losses characteristic for the adsorbed NCO it appeared that the preadsorbed oxygen exerted a significant stabilizing effect on the NCO bonded to the Rh.

Original languageEnglish
Pages (from-to)233-245
Number of pages13
JournalApplied Surface Science
Volume18
Issue number3
Publication statusPublished - Jul 1984

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Oxygen
Decomposition
decomposition
oxygen
desorption
Thermal desorption spectroscopy
Electrons
Surface reactions
Carbon Monoxide
surface reactions
Desorption
Energy dissipation
energy dissipation
electron energy
Adsorption
adsorption
products
spectroscopy
electrons
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry
  • Engineering(all)

Cite this

Effects of preadsorbed oxygen on the formation and decomposition of NCO on Rh(111) surfaces. / Solymosi, F.; Berkó, A.; Tarnóczi, T. I.

In: Applied Surface Science, Vol. 18, No. 3, 07.1984, p. 233-245.

Research output: Contribution to journalArticle

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