TY - JOUR
T1 - Investigation of the adsorption and decomposition of Fe(CO) 5 on fcc and bcc iron films by infrared reflection absorption spectroscopy
AU - Tanabe, T.
AU - Kubo, K.
AU - Ishibashi, T.
AU - Wadayama, T.
AU - Hatta, A.
N1 - Funding Information:
This work was supported by a grant-in-aids (T. W. No. 11450280) from the Ministry of Education, Science, Sports and Culture of Japan.
PY - 2003/2/28
Y1 - 2003/2/28
N2 - 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.
AB - 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.
KW - Chemisorption
KW - Infrared absorption spectroscopy
KW - Iron films
KW - Molecular beam epitaxy
KW - Pentacarbonyliron
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U2 - 10.1016/S0169-4332(02)01309-0
DO - 10.1016/S0169-4332(02)01309-0
M3 - Article
AN - SCOPUS:0037470453
SN - 0169-4332
VL - 207
SP - 115
EP - 120
JO - Applied Surface Science
JF - Applied Surface Science
IS - 1-4
ER -