Reactivity and structure of CF{sub 3}I on Ru(001)

Journal Article · Thu May 25 04:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100021a045· OSTI ID:62454

Jensen, M B; Myler, U; Jenks, C J; Thiel, P A ^[1]; Pylant, E D; White, J M ^[2]

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1. Iowa State Univ., Ames, IA (United States)
2. Univ. of Texas, Austin, TX (United States)

A variety of surface-sensitive techniques are used to elucidate the reaction pathways, as well as adsorbate structures, associated with thermal activation of CF{sub 3}J following adsorption on Ru(001) at 100 K. XPS shows that the C-I bond of CF{sub 3}I dissociates below 200 K to form CF{sub 3}(ad) and I(ad); the subsequent reactions of CF{sub 2} are best viewed as being regulated by the availability of surface sites. CF{sub 3}(ad) dissociates to CF{sub 2}(ad) below 200 K. Further CF{sub 3} dissociation, some of which is activated by H(ad), occurs between 200 and 400 K until all available sites are filled. Desorption of the remaining CF{sub 3}, peaking at 705 K, once again opens surface sites for decomposition. This is followed by recombination of the products to form CF{sub 3}(g). No evidence for CF(ad) is ever observed. Hydrogen coadsorption studies explain interesting features associated with fluorine evolution. HREELS and ESDIAD results indicate that CF{sub 3} adopts a tilted configuration on Ru(001). 53 refs., 11 figs., 3 tabs.

• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 62454
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 21 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ACTIVATION ENERGY
ADSORPTION
CHEMICAL REACTION KINETICS
DESORPTION
DISSOCIATION
ENERGY SPECTRA
ENERGY-LOSS SPECTROSCOPY
HYDROGEN
ORGANIC FLUORINE COMPOUNDS
ORGANIC IODINE COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RUTHENIUM
STRUCTURAL CHEMICAL ANALYSIS
VIBRATIONAL STATES
X-RAY SPECTROSCOPY