Hydrogen titration, scanning electron microscopy, and associated X-ray emission studies of Pt-Ru/Al/sub 2/O/sub 3/ catalysts
Journal Article
·
· J. Catal.; (United States)
OSTI ID:6158999
- Institute de Recherches sur la Catalyse (CNRS), Vileeurbanne Cedex, France
Two series of platinum-ruthenium catalysts deposited on ..gamma..-Al/sub 2/O/sub 3/ pellets and equivalent to 2 wt% Pt in number of (Pt + Ru) atoms were investigated. The first series (I) was prepared by successive impregnation of H/sub 2/RuCl/sub 6/ and of H/sub 2/PtCl/sub 6/ in water, and the second (II) by coimpregnation of H/sub 2/PtCl/sub 6/ and of H/sub 2/RuCl/sub 6/ in ethanol (75%) plus water. The chemisorption (O/sub 2/, H/sub 2/) and titration (mainly hydrogen temperature-programmed titration of chemisorbed oxygen) data showed catalysts (I) to be composed of mixtures of Pt and Ru particles, and catalysts (II) to be composed of alloy particles. This conclusion was on the whole corroborated by single particle x-ray emission analysis using x-ray emission in a scanning transmission electron microscope. This last technique further showed that the platinum particles in catalysts (I) contained a small amount of Ru. The reasons for the difference of state of the metallic particles in catalysts (I) and (II) are not totally elucidated but a tentative interpretation is given.
- OSTI ID:
- 6158999
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 70:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Effects of particle size and metal-support interactions on Fischer-Tropsch synthesis over Ru catalysts
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· 72nd AIChE Annu. Meet. Prepr.; (United States)
·
OSTI ID:6319358
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·
OSTI ID:7142010
Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISORPTION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN
METALS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM
PLATINUM
PLATINUM METALS
REFORMER PROCESSES
REFRACTORY METALS
RUTHENIUM
SCANNING ELECTRON MICROSCOPY
SEPARATION PROCESSES
SORPTION
SYNTHESIS
TITRATION
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISORPTION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN
METALS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM
PLATINUM
PLATINUM METALS
REFORMER PROCESSES
REFRACTORY METALS
RUTHENIUM
SCANNING ELECTRON MICROSCOPY
SEPARATION PROCESSES
SORPTION
SYNTHESIS
TITRATION
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS