Abstract
The adsorption and surface reactions of free gas phase methyl radicals on oxygen-modified Mo(100) have been studied using a combination of temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). Methyl radicals were found to adsorb on the surface at room temperature. Upon heating the surface methyl groups decompose to form surface hydrogen. The surface hydrogen hydrogenates the remaining intact methyl groups leading to methane which desorbs from the surface. The carbon produced by dehydrogenation combines with surface oxygen to yield CO. Comparison of the surface chemistry and the measured C(1s) binding energy with surface methoxy and with CH3 bonded to metal surfaces indicates that the methyl groups are primarily bonded to surface metal atoms to form a metal alkyl rather than to surface oxygen.
| Original language | English |
|---|---|
| Pages (from-to) | 1988-1993 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 115 |
| Issue number | 5 |
| Publication status | Published - Mar 10 1993 |
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ASJC Scopus subject areas
- Chemistry(all)
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Adsorption of methyl radicals on the oxygen-modified Mo(100) surface. / Smudde, George H.; Yu, Min; Stair, Peter C.
In: Journal of the American Chemical Society, Vol. 115, No. 5, 10.03.1993, p. 1988-1993.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Adsorption of methyl radicals on the oxygen-modified Mo(100) surface
AU - Smudde, George H.
AU - Yu, Min
AU - Stair, Peter C.
PY - 1993/3/10
Y1 - 1993/3/10
N2 - The adsorption and surface reactions of free gas phase methyl radicals on oxygen-modified Mo(100) have been studied using a combination of temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). Methyl radicals were found to adsorb on the surface at room temperature. Upon heating the surface methyl groups decompose to form surface hydrogen. The surface hydrogen hydrogenates the remaining intact methyl groups leading to methane which desorbs from the surface. The carbon produced by dehydrogenation combines with surface oxygen to yield CO. Comparison of the surface chemistry and the measured C(1s) binding energy with surface methoxy and with CH3 bonded to metal surfaces indicates that the methyl groups are primarily bonded to surface metal atoms to form a metal alkyl rather than to surface oxygen.
AB - The adsorption and surface reactions of free gas phase methyl radicals on oxygen-modified Mo(100) have been studied using a combination of temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). Methyl radicals were found to adsorb on the surface at room temperature. Upon heating the surface methyl groups decompose to form surface hydrogen. The surface hydrogen hydrogenates the remaining intact methyl groups leading to methane which desorbs from the surface. The carbon produced by dehydrogenation combines with surface oxygen to yield CO. Comparison of the surface chemistry and the measured C(1s) binding energy with surface methoxy and with CH3 bonded to metal surfaces indicates that the methyl groups are primarily bonded to surface metal atoms to form a metal alkyl rather than to surface oxygen.
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M3 - Article
VL - 115
SP - 1988
EP - 1993
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 5
ER -