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  The Effect of Water on the 2-Propanol Oxidation Activity of Co-Substituted LaFe1−CoxO3 Perovskites

Dreyer, M., Cruz, D., Hagemann, U., Zeller, P., Heidelmann, M., Salamon, S., et al. (2021). The Effect of Water on the 2-Propanol Oxidation Activity of Co-Substituted LaFe1−CoxO3 Perovskites. Chemistry – A European Journal. doi:10.1002/chem.202102791.

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 Creators:
Dreyer, Maik1, Author
Cruz, Daniel2, 3, Author              
Hagemann, Ulrich4, 5, Author
Zeller, Patrick2, 5, Author              
Heidelmann, Markus4, Author
Salamon, Soma6, Author
Landers, Joachim6, Author
Rabe, Anna1, Author
Ortega, Klaus Friedel7, Author
Najafishirtari, Sharif1, Author
Wende, Heiko6, Author
Hartmann, Nils4, Author
Knop-Gericke, Axel2, 3, Author              
Schlögl, Robert2, 3, Author              
Behrens, Malte1, 7, Author
Affiliations:
1Faculty for Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstr. 7, Essen, 45141, Germany, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34–36, Mülheim an der Ruhr, 45470, Germany, ou_persistent22              
4Interdisciplinary Center for Analytics on the Nanoscale (ICAN), NanoEnergieTechnikZentrum at University of Duisburg-Essen, Carl-Benz-Str. 199, Duisburg, 47057, Germany, ou_persistent22              
5Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, BESSY II, Department of Catalysis for Energy, Albert-Einstein-Straße 15, Berlin, 12489, Germany, ou_persistent22              
6Faculty of Physics and CENIDE, University of Duisburg-Essen, Lotharstr. 1, Duisburg, 47057, Germany, ou_persistent22              
7Institute of Inorganic Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, Kiel, 24118, Germany, ou_persistent22              

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 Abstract: Perovskites are interesting oxidation catalysts due to their chemical flexibility enabling the tuning of several properties. In this work, we synthesized LaFe1−xCoxO3 catalysts by co-precipitation and thermal decomposition, characterized them thoroughly and studied their 2-propanol oxidation activity under dry and wet conditions to bridge the knowledge gap between gas and liquid phase reactions. Transient tests showed a highly active, unstable low-temperature (LT) reaction channel in conversion profiles and a stable, less-active high-temperature (HT) channel. Cobalt incorporation had a positive effect on the activity. The effect of water was negative on the LT channel, whereas the HT channel activity was boosted for x > 0.15. The boost may originate from a slower deactivation rate of the Co3+ sites under wet conditions and a higher amount of hydroxide species on the surface comparing wet to dry feeds. Water addition resulted in a slower deactivation for Co-rich catalysts and higher activity in the HT channel state.

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Language(s): eng - English
 Dates: 2021-07-312021-10-112021-11-08
 Publication Status: Published online
 Pages: 19
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/chem.202102791
 Degree: -

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Title: Chemistry – A European Journal
  Other : Chem. – Eur. J.
  Other : Chem. Eur. J.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: 19 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0947-6539
CoNE: https://pure.mpg.de/cone/journals/resource/954926979058