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  Molybdenum Oxide Based Partial Oxidation Catalyst: 4. TEM Identification of a New Oxygen-Reduced Phase Formed During Acrolein Partial Oxidation under Reducing Conditions

Uchida, Y., Mestl, G., Ovsitser, O., Jäger, J., Blume, A., & Schlögl, R. (2002). Molybdenum Oxide Based Partial Oxidation Catalyst: 4. TEM Identification of a New Oxygen-Reduced Phase Formed During Acrolein Partial Oxidation under Reducing Conditions. Journal of Molecular Catalysis A, 187(2), 247-257. doi:10.1016/S1381-1169(02)00211-X.

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Uchida, Yuji1, Author           
Mestl, Gerhard, Author
Ovsitser, Olga1, Author           
Jäger, Joachim1, Author           
Blume, Andreas1, Author           
Schlögl, Robert1, Author           
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1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: HRTEM, SAED, multielement mixed metal oxide catalysts, acrolein oxidation 8 Mixed V/W/Mo oxides for selective oxidation
 Abstract: A new Mo-based structure was detected by high resolution transmission electron microscopy (HRTEM) and electron diffraction techniques in a molybdenum based mixed oxide catalyst after operation in the partial oxidation of acrolein at temperatures between 533 and 573 K for 9 h. This new crystalline phase has an orthorhombic crystal system. The structure has presumably a space group of Pban, but Pmmn cannot be excluded. XRD analysis was further used to refine this new Mo2O5 structure. The lattice constants were estimated to be a = 1217.5, b = 374.7 and c = 404.4 pm, respectively. The elemental composition of the crystal was determined by the EDAX system attached to the electron microscope to be about (Mo0.6V0.3W0.1)2O5-x. This new structure is discussed in relation to earlier reports on a comparable composition and with respect to its possible role for partial oxidation catalysis.

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Language(s): eng - English
 Dates: 2002-09-18
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: eDoc: 1764
DOI: 10.1016/S1381-1169(02)00211-X
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Title: Journal of Molecular Catalysis A
Source Genre: Journal
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Pages: - Volume / Issue: 187 (2) Sequence Number: - Start / End Page: 247 - 257 Identifier: ISSN: 1381-1169