Frequency of the stretching vibrations of adsorbed carbon monoxide as an indicator of the electronic state of a supported platinum surface
Journal Article
·
· Kinet. Catal. (USSR) (Engl. Transl.); (United States)
OSTI ID:7037575
An investigation has been made of the influence of the metal particle size and the nature of the support on the frequency of the stretching vibration of carbon monoxide adsorbed on a supported platinum surface. It was found that an increase of the platinum particle size leads to an increase in ..nu..(CO). On the basis of a comparison of the results obtained in the cases of different supports (SiO/sub 2/ and Al/sub 2/O/sub 3/), the influence of the nature of the support on the electronic properties of the surface atoms of supported platinum is discussed. The observed results are interpreted in terms of sigma and ..pi.. interaction of a CO molecule with a surface atom of the metal. Is is inferred that IR spectroscopy of adsorbed CO can be used to monitor or measure dispersity and this was illustrated by experiments on monitoring changes in the dispersity of Pt/Al/sub 2/O/sub 3/ when samples of it were treated in an oxygen atmosphere over the range 200 to 700/sup 0/C. 1 figure, 2 tables.
- Research Organization:
- Inst. of Catalysis, Novosibirsk, USSR
- OSTI ID:
- 7037575
- Journal Information:
- Kinet. Catal. (USSR) (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (USSR) (Engl. Transl.); (United States) Vol. 20:3; ISSN KICAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
ELEMENTS
FREQUENCY MEASUREMENT
HIGH TEMPERATURE
INFRARED SPECTRA
LATTICE VIBRATIONS
METALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PLATINUM
PLATINUM METALS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SORPTION
SPECTRA
TRANSITION ELEMENTS
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
ELEMENTS
FREQUENCY MEASUREMENT
HIGH TEMPERATURE
INFRARED SPECTRA
LATTICE VIBRATIONS
METALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PLATINUM
PLATINUM METALS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SORPTION
SPECTRA
TRANSITION ELEMENTS