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  Operando Electrical Conductivity and Complex Permittivity Study on Vanadia Oxidation Catalysts

Wernbacher, A. M., Eichelbaum, M., Risse, T., Cap, S., Trunschke, A., & Schlögl, R. (2019). Operando Electrical Conductivity and Complex Permittivity Study on Vanadia Oxidation Catalysts. The Journal of Physical Chemistry C, 123(13), 8005-8017. doi:10.1021/acs.jpcc.8b07417.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-7FC2-5 Version Permalink: https://hdl.handle.net/21.11116/0000-0006-8441-B
Genre: Journal Article

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 Creators:
Wernbacher, Anna Maria1, Author           
Eichelbaum, Maik1, Author           
Risse, Thomas2, Author
Cap, Sébastien1, Author           
Trunschke, Annette1, Author           
Schlögl, Robert1, 3, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Institut für Chemie und Biochemie - Physikalische und Theoretische Chemie, Freie Universität Berlin, ou_persistent22              
3Heterogeneous Reactions, Max-Planck-Institute for Chemical Energy Conversion , Stiftstr. 34 - 36 45470 Mülheim an der Ruhr, Germany, ou_persistent13              

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 Abstract: The electrical conductivity and its real and imaginary permittivity parameters were studied over two vanadium-containing catalysts for the selective oxidation of n-butane to maleic anhydride. Parameter variation under isothermal conditions allowed determination of multiple steady-state conditions for catalytic performance and charge carrier dynamics. One sample was the n-type semiconductor V2O5–x with low selectivity, and the other sample was the p-type semiconductor vanadyl pyrophosphate (VPP) with high selectivity for the target product. Well-resolved conductivity parameters supported by in situ UV–vis studies allowed correlations between performance and charge carrier dynamics. A concept for interpreting the trends is presented, and consequences for further analytical work as well as for material design are derived.

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Language(s): eng - English
 Dates: 2018-09-242018-07-312018-09-272019-04-04
 Publication Status: Issued
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpcc.8b07417
 Degree: -

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Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: 13 Volume / Issue: 123 (13) Sequence Number: - Start / End Page: 8005 - 8017 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766