Raman spectrum of carbon monoxide chemisorbed on silica-supported nickel

Journal Article · Sat Mar 01 04:00:00 EST 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90424-8· OSTI ID:5075107

Krasser, W ^[1]; Fadini, A; Renouprez, A J

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1. Institut fuer Festkoerperforschung der KFA Juelich, Germany

The Raman spectrum of carbon monoxide chemisorbed on silica-supported nickel has been investigated at pressures below 10 Torr. Two ..nu..(C-O) stretching vibrations are found and assigned to linearly and bridge-bonded CO molecules, respectively. With decreasing pressure a frequency shift from 2100 to 2065 cm/sup -1/ is observed for the linear species and from 1940 to 1770 cm/sup -1/ for the bridge-bonded species. At lower wavenumbers several bands are found, which are assigned to ..nu..(Ni-C) stretching vibrations of the two chemisorbed species located on different lattice sites. The observed frequency of the delta(Ni-C-O) deformation vibration agrees well with calculations based on the evaluation of electron energy loss spectroscopy data. For the assignment of the vibrational bands, an FG matrix calculation has been carried out. 5 figures, 2 tables.

• OSTI ID: 5075107
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 62:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500 -- Photochemistry
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
ENERGY LOSSES
EXCITED STATES
LOSSES
LOW PRESSURE
MEDIUM VACUUM
METALS
MINERALS
NICKEL
OXIDES
OXYGEN COMPOUNDS
RAMAN SPECTRA
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENTS
VIBRATIONAL STATES