Study of the mechanism of formation of Raney Ni catalysts
Journal Article
·
· Kinet. Catal. (Engl. Transl.); (United States)
OSTI ID:6334751
The mechanism of oxidation of nickel during preparation of Raney Ni from Al +NiAl/sub 3/ and NiAl/sub 3/ alloys was specified by methods of transmission electron microscopy. It was shown that Ni/sup 0/ is oxidized into Ni/sup 2 +/ by water even in the presence of hydrogen. Ultrasonic irradiation of the catalysts is an intensifying factor in oxide formation. The experiments conducted thus indicate that nickel oxides are formed in the electron microscopic preparations due to oxidation by water and not due to the direct oxidation of the catalysts and not as a result of the reaction of the sample with the oxygen remaining in the vacuum system of the electron microscope.
- Research Organization:
- Institute of Organic Catalysis and Electrochemistry, Alma-Ata (USSR)
- OSTI ID:
- 6334751
- Journal Information:
- Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 29:2; ISSN KICAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
FCC LATTICES
HYDRIDES
HYDROGEN COMPOUNDS
METALS
MICROSCOPY
MICROSTRUCTURE
NICKEL
NICKEL ALLOYS
NICKEL COMPOUNDS
NICKEL HYDRIDES
NICKEL OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POROSITY
SCATTERING
SOUND WAVES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
ULTRASONIC WAVES
VALENCE
WATER
360105 -- Metals & Alloys-- Corrosion & Erosion
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
FCC LATTICES
HYDRIDES
HYDROGEN COMPOUNDS
METALS
MICROSCOPY
MICROSTRUCTURE
NICKEL
NICKEL ALLOYS
NICKEL COMPOUNDS
NICKEL HYDRIDES
NICKEL OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POROSITY
SCATTERING
SOUND WAVES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
ULTRASONIC WAVES
VALENCE
WATER