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  Analysis of structural transformations during the synthesis of a MoVTeNb mixed oxide calalyst

Beato, P., Blume, A., Girgsdies, F., Jentoft, R. E., Schlögl, R., Timpe, O., et al. (2006). Analysis of structural transformations during the synthesis of a MoVTeNb mixed oxide calalyst. Applied Catalysis A, 307, 137-147. doi:10.1016/j.apcata.2006.03.014.

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 Creators:
Beato, Pablo1, Author           
Blume, Andreas1, Author           
Girgsdies, Frank1, Author           
Jentoft, Rolf E.1, Author           
Schlögl, Robert1, Author           
Timpe, Olaf1, Author           
Trunschke, Annette1, Author           
Weinberg, Gisela1, Author           
Basher, Qureshia, Author
Hamid, Faziliana A., Author
Abd Hamid, Sharifah Bee, Author
Omar, Emmy, Author
Mohd Salim, Lisa, Author
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: MoVTeNb mixed oxide; Preparation; Raman; Phase structure; M1; M2; Catalyst; Selective oxidation; Propane; Acrylic acid 4, Molybdenum Oxide in selective C3 oxidation
 Abstract: This work presents a detailed investigation of the preparation routine for the multi-metal oxide Mo1V0.30Te0.23Nb0.125Ox used as catalyst for the selective oxidation of propane to acrylic acid. In situ Raman spectroscopy on the initial aqueous polyoxometalate solution prepared from ammonium heptamolybdate, ammonium metavanadate and hexaoxotelluric acid reveals the coexistence of Anderson-type anions [TeM6O24]n−, M = Mo, V; n ≥ 6 and protonated decavanadate species [HxV10O28](6−x)−. Raman analysis showed that the monomeric motif of the Anderson-type tellurate is preserved after addition of the Nb precursor and the subsequent spray-drying process. Calcination of the X-ray amorphous spray-dried material in air at 548 K seems to be the essential step, leading to a re-arrangement of the tellurate building blocks, generating nanocrystalline precursors of the phases finally established during treatment in helium at 873 K.

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Language(s): eng - English
 Dates: 2006-04-18
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 275623
DOI: 10.1016/j.apcata.2006.03.014
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Title: Applied Catalysis A
  Alternative Title : Appl. Catal. A
Source Genre: Journal
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Pages: - Volume / Issue: 307 Sequence Number: - Start / End Page: 137 - 147 Identifier: -