Investigation of the adsorption and decomposition of Fe(CO) 5 on fcc and bcc iron films by infrared reflection absorption spectroscopy

T. Tanabe, K. Kubo, T. Ishibashi, T. Wadayama, A. Hatta

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The adsorption and decomposition of Fe(CO) 5 on fcc and bcc iron films at 90 K were investigated using infrared reflection absorption spectroscopy (IRRAS). The fcc film was epitaxially grown on a Cu(1 0 0) crystal at room temperature, whereas the bcc film was deposited as polycrystalline by electron-beam evaporation onto a Si(111) wafer. The saturated adsorption of Fe(CO) 5 on the fcc Fe(1 0 0) surface yielded a dominant IRRAS band at 2060 cm -1 due to the axial C-O stretch mode of Fe(CO) 5 . Upon UV (254 nm) irradiation to the adsorbed layer, the 2060 cm -1 band decreased in intensity and a new band appeared at 2072 cm -1 , indicating the photolytic decomposition of the adsorbed Fe(CO) 5 . Fe(CO) 5 adsorption on the polycrystalline bcc surface gave rise to a single intense band at 2072 cm -1 which was not changed in position by UV irradiation. We conclude from these results that the fcc(1 0 0) surface is inactive for the decomposition of Fe(CO) 5 in comparison to the polycrystalline bcc surface.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalApplied Surface Science
Volume207
Issue number1-4
DOIs
Publication statusPublished - 2003 Feb 28

Keywords

  • Chemisorption
  • Infrared absorption spectroscopy
  • Iron films
  • Molecular beam epitaxy
  • Pentacarbonyliron

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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