Surface reactions of ethyl groups on clean and O-modified Ru(001)

A. Kis, J. Kiss, D. Olasz, F. Solymosi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The surface reactions of C2H5 species produced by thermal and UV photon-induced dissociation of C2H5I have been followed by means of temperature-programmed desorption and X-ray photoelectron spectroscopy. Cleavage of the C-I bond begins at 130 K on the clean surface. The primary products of thermal dissociation are adsorbed C2H5 and I. C2H5 groups take part in hydrogenation/dehydrogenation reactions forming C2H6 in gas-phase and adsorbed ethylidyne (CCH3) on the surface. Preadsorbed O(a) exerts a significant stabilization influence on the dissociation and the desorption of the parent molecule. In its presence the amount of CCH3 decreases and C2H4 appears in the desorbing products. In addition, oxygen atoms react with C2H5 to give diethyl ether and, at higher coverage, acetaldehyde. The decomposition of CCH3(a) on the O-presaturated sample produces carbidic deposits (C, CHx), which react with oxygen to form CO. UV illumination enhances the dissociation of the C-I bond and consequently the formation of CCH3(a) on clean Ru(001), but the product distribution on an O-covered surface is not affected by irradiation.

Original languageEnglish
Pages (from-to)5221-5229
Number of pages9
JournalJournal of Physical Chemistry B
Volume106
Issue number20
DOIs
Publication statusPublished - May 23 2002

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Surface reactions
surface reactions
dissociation
products
desorption
thermal dissociation
diethyl ether
acetaldehyde
dehydrogenation
Oxygen
hydrogenation
Acetaldehyde
cleavage
oxygen atoms
Dehydrogenation
Carbon Monoxide
Temperature programmed desorption
stabilization
illumination
deposits

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Surface reactions of ethyl groups on clean and O-modified Ru(001). / Kis, A.; Kiss, J.; Olasz, D.; Solymosi, F.

In: Journal of Physical Chemistry B, Vol. 106, No. 20, 23.05.2002, p. 5221-5229.

Research output: Contribution to journalArticle

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AB - The surface reactions of C2H5 species produced by thermal and UV photon-induced dissociation of C2H5I have been followed by means of temperature-programmed desorption and X-ray photoelectron spectroscopy. Cleavage of the C-I bond begins at 130 K on the clean surface. The primary products of thermal dissociation are adsorbed C2H5 and I. C2H5 groups take part in hydrogenation/dehydrogenation reactions forming C2H6 in gas-phase and adsorbed ethylidyne (CCH3) on the surface. Preadsorbed O(a) exerts a significant stabilization influence on the dissociation and the desorption of the parent molecule. In its presence the amount of CCH3 decreases and C2H4 appears in the desorbing products. In addition, oxygen atoms react with C2H5 to give diethyl ether and, at higher coverage, acetaldehyde. The decomposition of CCH3(a) on the O-presaturated sample produces carbidic deposits (C, CHx), which react with oxygen to form CO. UV illumination enhances the dissociation of the C-I bond and consequently the formation of CCH3(a) on clean Ru(001), but the product distribution on an O-covered surface is not affected by irradiation.

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