ESCA study of [open quotes]model[close quotes] allyl-based Mo/SiO[sub 2] catalysts
- Univ. of Pittsburgh, PA (United States)
Stoichiometric redox measurements and X-ray photoelectron spectroscopy (XPS or ESCA) studies were performed on an allyl-based Mo/SiO[sub 2] catalyst (1.7 wt % Mo) obtained by the sublimation of Mo([eta][sup 3]-C[sub 3]H[sub 5])[sub 4] onto SiO[sub 2] at 40 [degrees]C. The average oxidation state estimated from stoichiometric measurements correlated well with those reported in the literature. ESCA results indicated that reduction of the Mo/SiO[sub 2] catalyst at 550 [degrees]C primarily led to the formation of Mo[sup 2+]. Also, the results were consistent the reported reversibility of the redox cycle. However, the reported formation of discrete Mo[sup 4+] by oxidation of the reduced catalyst at room temperature could not be substantiated. 17 refs., 4 figs., 2 tabs.
- DOE Contract Number:
- FG02-87ER13781
- OSTI ID:
- 6044885
- Journal Information:
- Journal of Physical Chemistry; (United States), Vol. 97:21; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
ELECTRON SPECTROSCOPY
REDOX REACTIONS
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
MOLYBDENUM COMPOUNDS
ORGANOMETALLIC COMPOUNDS
SILICA
STOICHIOMETRY
SUBLIMATION
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
EVAPORATION
INFORMATION
MAGNETIC RESONANCE
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REFRACTORY METAL COMPOUNDS
RESONANCE
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties
400102 - Chemical & Spectral Procedures