EXAFS characterization of Ru/Al/sub 2/O/sub 3/ catalysts using synchrotron radiation
Journal Article
·
· J. Catal.; (United States)
OSTI ID:5330420
The morphology of ruthenium catalysts, prepared from Ru-acetylacetonate (Ru(acac)/sub 3/) as precursor on ..gamma..-Al/sub 2/O/sub 3/ at 1.16 wt% of Ru, has been studied by EXAFS, XPS, and oxygen chemisorption techniques. Ru(acac)/sub 3/-impregnated ..gamma..-Al/sub 2/O/sub 3/ has been variously reduced with hydrogen at 200, 300, or 400/sup 0/C for 4 or 8 h. All samples treated at 200/sup 0/C show incomplete Ru reduction while for the sample treated at 300/sup 0/C for 4 h the formation of Ru clusters is essentially complete and no further modifications are observed for longer reduction times or higher temperatures. Ru is anchored to the support probably through Ru/sup n+/-O bonds. Ru(acac)/sub 3/ is therefore a useful precursor for obtaining Ru catalysts without contaminants in contrast with the behavior of Ru salts containing chlorine
- Research Organization:
- Istituto Donegani S.p.A., Novara (Italy)
- OSTI ID:
- 5330420
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 107:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISORPTION
ELECTRON SPECTROSCOPY
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
HYDROGENATION
METALS
MORPHOLOGY
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM METALS
REDUCTION
RUTHENIUM
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISORPTION
ELECTRON SPECTROSCOPY
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
HYDROGENATION
METALS
MORPHOLOGY
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM METALS
REDUCTION
RUTHENIUM
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY