Surface-Aligned Photoreaction of DBr with C2H4 on Pt(111)

J. Kiss, Diann J. Alberas, J. M. White

Research output: Contribution to journalArticle

4 Citations (Scopus)


For ethylene and deuterium bromide coadsorbed on Pt(111) at 52 K, evidence is presented for photon-driven production of ethane and bromoethane. The formation of bromoethane is ascribed to a surface-aligned concerted reaction between photoexcited DBr- or its vibrationally excited, electronically quenched form, and C2H4. This reaction is more likely when the C2H4 is adsorbed over a chemisorbed layer of DBr. Ethane is best accounted for on the basis of photogenerated energetic D atoms reacting with C2H4 to form C2H4D, and the latter being hydrogenated during temperature-programmed desorption by active D atoms derived from dissociating DBr. When C2H4 and DBr are both in the first layer, the π-bonded form of ethylene reacts more readily than the di-σ-bonded form.

Original languageEnglish
Pages (from-to)10486-10492
Number of pages7
JournalJournal of the American Chemical Society
Issue number26
Publication statusPublished - Dec 1 1992

ASJC Scopus subject areas

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

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