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

DOI:https://doi.org/10.1021/cm800546h· OSTI ID:1040766

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

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1. University of Cincinnati
2. ORNL

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)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1040766
• 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
CATALYSTS
OXIDES
PROPANE
VALENCE
VANADIUM
X-RAY DIFFRACTION