Infrared study of CO on NiO(100)
Journal Article
·
· Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States)
- Department of Chemistry, Texas A M University, College Station, Texas 77843-3255 (United States)
The nature of the interaction of CO with NiO(100) thin films ([similar to]20--50 A) grown on a Mo(100) substrate has been investigated with infrared reflection absorption spectroscopy. Isosteric heats of adsorption were measured for CO in a pressure range of 1[times]10[sup [minus]8] to 1 Torr and over a temperature range of 93--280 K. The average heat of adsorption was found to be approximately 10.4 kcal/mol, with the heat of adsorption decreasing slightly with increasing CO coverage. This value for the heat of adsorption agrees very well with that measured for CO on MgO(100). The CO stretching frequency was found to decrease with an increase in the CO coverage. At constant coverage, the CO stretching frequency as well as the full width at half-maximum were found to increase with increasing temperature. These results are discussed in the context of current theories of bonding between CO and oxide surfaces.
- OSTI ID:
- 7174346
- Journal Information:
- Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States) Vol. 12:4; ISSN 0734-2101; ISSN JVTAD6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
FILMS
HIGH VACUUM
INFRARED SPECTRA
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
360606* -- Other Materials-- Physical Properties-- (1992-)
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
FILMS
HIGH VACUUM
INFRARED SPECTRA
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TRANSITION ELEMENT COMPOUNDS