Xanes Study of Hydrothermal Mo-V-Based Mixed Oxide M1-Phase Catalysts for the (Amm)oxidation of Propane

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Chemistry of Materials

OSTI ID:1043317

Mullins, David R ^[1]; Schwartz, Viviane ^[1]; Guliants, Vadim ^[1]; Shiju, N. R. ^[2]

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1. ORNL
2. University of Cincinnati

The hydrothermal Mo-V-based mixed oxide catalysts possessing the M1-phase structure were investigated by XANES and in situ X-ray diffraction under ambient and dynamic redox conditions in the presence of O{sub 2} and H{sub 2} at 693 K. Under ambient conditions, XANES, with the use of model compounds, suggested oxidation states of Nb, Te, Mo, and V close to 5+, 4+, 6+, and 4+, respectively, in the bulk M1 phase. The oxidation state changes of Nb, Te, and Mo were not detected under the dynamic redox conditions employed, while the pre-edge peak of vanadium in the M1 phase exhibited small, reproducible shifts, suggesting that VO{sub x} is the active catalytic species in the bulk M1-phase catalysts for selective (amm)oxidation of propane.

• Research Organization: Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1043317
• Journal Information: Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 21 Vol. 20; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
CATALYSTS
MOLYBDENUM COMPOUNDS
OXIDES
PROPANE
REDOX POTENTIAL
VALENCE
VANADIUM COMPOUNDS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY