Use of ESCA valence bands to infer structural information about the molybdenum phase in supported molybdenum catalysts
- Univ. of Pittsburgh at Pittsburgh, PA (United States)
- Kansas State Univ., Manhattan (United States)
- Univ. of Pittsburgh at Bradford, PA (United States)
X-ray photoelectron spectroscopy (XPS, ESCA) valence band spectra were used to infer information about the molybdenum phase in standard Mo compounds such as sodium molybdate and ammonium heptamolybdate and in Mo/Al[sub 2]O[sub 3] catalysts prepared by equilibrium adsorption and incipient wetness impregnation methods. ESCA valence band measurements can distinguish between tetrahedrally coordinated Mo (sodium molybdate) and octahedrally coordinated Mo (ammonium molybdate). Mo ESCA valence band results show that Mo/Al[sub 2]O[sub 3] catalysts prepared by equilibrium adsorption at pH 2.2 and Mo/Al[sub 2]O[sub 3] catalysts prepared by incipient wetness impregnation contain primarily octahedral Mo. 31 refs., 7 figs.
- DOE Contract Number:
- FG02-87ER13781
- OSTI ID:
- 6568875
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 96:26; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
ADSORPTION
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMMONIUM COMPOUNDS
CATALYSTS
CHALCOGENIDES
ELECTRON SPECTROSCOPY
MOLYBDENUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SODIUM COMPOUNDS
SORPTION
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
X-RAY SPECTROSCOPY