Temperature dependence of extended x-ray absorption fine structure spectra of Rh and Pd catalysts in the strong metal-support interaction state
Journal Article
·
· Journal of Physical Chemistry; (USA)
- Univ. of Tokyo (Japan)
The temperature dependence of EXAFS spectrum was investigated on the normal and SMSI states of Rh/TiO{sub 2} and Pd/TiO{sub 2} catalysts. The mean square relative displacement (MSRD) of metal-metal bondings of supported metal was derived by the analysis of EXAFS data with the cumulant expansion technique, and the Debye temperature was estimated from the temperature dependence of MSRD. The Debye temperature or Rh-Rh bond of Rh/TiO{sub 2} catalyst was found to be higher by 38 K in its SMSI state in comparison with the normal state. This difference was shown to be due to the significant increase of the surface Debye temperature of Rh metal particles. A similar results was obtained for Pd/TiO{sub 2} catalyst. These facts were concluded to support the decoration model for the SMSI state.
- OSTI ID:
- 6712685
- Journal Information:
- Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:26; ISSN 0022-3654; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure of a Rh/TiO/sub 2/ catalyst in the strong metal-support interaction state as determined by EXAFS
Structure of Rh/TiO/sub 2/ in the normal and the SMSI state as determined by extended x-ray absorption fine structure and high-resolution transmission electron microscopy
Reversibility of strong metal-support interactions on Rh/TiO sub 2
Journal Article
·
Thu Jul 03 00:00:00 EDT 1986
· J. Phys. Chem.; (United States)
·
OSTI ID:5659201
Structure of Rh/TiO/sub 2/ in the normal and the SMSI state as determined by extended x-ray absorption fine structure and high-resolution transmission electron microscopy
Journal Article
·
Thu Apr 07 00:00:00 EDT 1988
· J. Phys. Chem.; (United States)
·
OSTI ID:5129757
Reversibility of strong metal-support interactions on Rh/TiO sub 2
Journal Article
·
Sat Jul 01 00:00:00 EDT 1989
· Journal of Catalysis; (USA)
·
OSTI ID:7015216
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CALCULATION METHODS
CATALYSTS
CHALCOGENIDES
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
FINE STRUCTURE
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
RHODIUM
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CALCULATION METHODS
CATALYSTS
CHALCOGENIDES
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
FINE STRUCTURE
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
RHODIUM
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS