Reactivity of C2Cl6 and C2Cl4 multilayers with Fe0 atoms over FeO(111)

Journal Article · Thu Jun 11 04:00:00 EDT 2009 · Journal of Physical Chemistry C, 113(23):10233-10241

DOI:https://doi.org/10.1021/jp810143y· OSTI ID:963185

Parkinson, Gareth S; Dohnalek, Zdenek; Smith, R Scott; Kay, Bruce D

The interaction of Fe0 atoms with C2Cl6 multilayers over FeO(111) has been investigated using the “atom dropping” preparation technique and a combination of temperature programmed desorption, Auger electron spectroscopy, and x-ray photoelectron spectroscopy. The reactivity and reaction products are strongly dependent on the Fe0 coverage. Submonolayer Fe0 doses lead to high reactivity and primarily FeCl3 and C4Cl6, whereas multilayer Fe0 doses lead to the production of FeCl2 and C2Cl4 with much lower Fe0 reactivity. The data are consistent with a model where Fe atoms form intermediate species at low coverage, which consist of a Fe atom inserted into a C-Cl bond. When two Fe atoms react with C2Cl6, a different intermediate species is formed which produces the alternative reaction pathway and the formation of C2Cl4. Similar atom dropping experiments demonstrate that C2Cl4 is also reactive towards Fe0 atoms at low Fe0 dose, leading to the production of one FeCl2 molecule per C2Cl4 molecule reacted. At higher coverages, Fe atoms form clusters which are much less reactive toward C2Cl4.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 963185
• Report Number(s): PNNL-SA-63976; KC0303020
• Journal Information: Journal of Physical Chemistry C, 113(23):10233-10241, Journal Name: Journal of Physical Chemistry C, 113(23):10233-10241 Journal Issue: 23 Vol. 113; ISSN 1932-7447
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACTIVATION ENERGY
CHEMICAL REACTION KINETICS
CHLORINATED ALIPHATIC HYDROCARBONS
INTERACTIONS
IRON CHLORIDES
IRON OXIDES
MEASURING METHODS
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temperature programmed desorption