Surface chemistry on transition metal colloids: An infrared and NMR study of carbon monoxide adsorption on colloidal platinum
Journal Article
·
· Journal of Catalysis; (USA)
- Exxon Research and Engineering Co., Annandale, NJ (USA)
Highly dispersed (<10{angstrom}) platinum has been prepared in colloidal solution by condensing platinum vapor into a solution of triisobutylaluminoxane in methylcyclohexane. Carbon monoxide, adsorbed in a linear mode on the surface of the colloidal metal, has been characterized by infrared spectroscopy and {sup 13}C NMR. The chemical shift of the adsorbed CO is 192 ppm, and the absence of a Knight shift is interpreted in terms of a pseudomolecular description of the highly dispersed platinum particles, which are not large enough to exhibit metallic properties. The CO covered colloid is converted by hydrolysis into the molecular platinum carbonyl anion clusters (Pt{sub 3}(CO){sub 6}){sub n}{sup 2 {minus}}, n = 3, 4.
- OSTI ID:
- 5679669
- Journal Information:
- Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 129:2; ISSN 0021-9517; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CARBONYLS
CHALCOGENIDES
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
CHEMICAL SHIFT
COLLOIDS
COMPLEXES
DECOMPOSITION
DISPERSIONS
DISTRIBUTION
ELEMENTS
EVEN-ODD NUCLEI
HYDROLYSIS
INFRARED SPECTRA
ISOTOPES
KNIGHT SHIFT
LIGHT NUCLEI
LYSIS
MAGNETIC RESONANCE
METALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PLATINUM
PLATINUM COMPLEXES
PLATINUM METALS
RESONANCE
SIZE
SOLVOLYSIS
SORPTION
SORPTIVE PROPERTIES
SPECTRA
STABLE ISOTOPES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CARBONYLS
CHALCOGENIDES
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
CHEMICAL SHIFT
COLLOIDS
COMPLEXES
DECOMPOSITION
DISPERSIONS
DISTRIBUTION
ELEMENTS
EVEN-ODD NUCLEI
HYDROLYSIS
INFRARED SPECTRA
ISOTOPES
KNIGHT SHIFT
LIGHT NUCLEI
LYSIS
MAGNETIC RESONANCE
METALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PLATINUM
PLATINUM COMPLEXES
PLATINUM METALS
RESONANCE
SIZE
SOLVOLYSIS
SORPTION
SORPTIVE PROPERTIES
SPECTRA
STABLE ISOTOPES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS