Adsorption of Methyl Radicals on the Oxygen-Modified Mo(100) Surface

George H. Smudde*, Min Yu, Peter C. Stair

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


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 languageEnglish (US)
Pages (from-to)1988-1993
Number of pages6
JournalJournal of the American Chemical Society
Issue number5
StatePublished - Mar 1 1993

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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