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  Monitoring Catalytic 2-Propanol Oxidation over Co3O4 Nanowires via In Situ Photoluminescence Spectroscopy

Klein, J., Kampermann, L., Korte, J., Dreyer, M., Budiyanto, E., Tüysüz, H., et al. (2022). Monitoring Catalytic 2-Propanol Oxidation over Co3O4 Nanowires via In Situ Photoluminescence Spectroscopy. The Journal of Physical Chemistry Letters, 13(14), 3217-3223. doi:10.1021/acs.jpclett.2c00098.

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 Creators:
Klein, Julian1, Author
Kampermann, Laura1, Author
Korte, Jannik1, Author
Dreyer, Maik2, Author
Budiyanto, Eko3, Author              
Tüysüz, Harun3, Author              
Ortega, Klaus Friedel4, Author
Behrens, Malte2, 4, Author
Bacher, Gerd1, Author
Affiliations:
1Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen, Bismarckstraße 81, 47057 Duisburg, Germany, ou_persistent22              
2Faculty for Chemistry, Inorganic Chemistry and CENIDE, Universität Duisburg-Essen, 45141 Essen, Germany, ou_persistent22              
3Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
4Institute for Inorganic Chemistry, Christian-Albrechts-Universität zu Kiel, 24118 Kiel, Germany, ou_persistent22              

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 Abstract: Spectroscopic methods enabling real-time monitoring of dynamic surface processes are a prerequisite for identifying how a catalyst triggers a chemical reaction. We present an in situ photoluminescence spectroscopy approach for probing the thermocatalytic 2-propanol oxidation over mesostructured Co3O4 nanowires. Under oxidative conditions, a distinct blue emission at ∼420 nm is detected that increases with temperature up to 280 °C, with an intermediate maximum at 150 °C. Catalytic data gained under comparable conditions show that this course of photoluminescence intensity precisely follows the conversion of 2-propanol and the production of acetone. The blue emission is assigned to the radiative recombination of unbound acetone molecules, the n ↔ π* transition of which is selectively excited by a wavelength of 270 nm. These findings open a pathway for studying thermocatalytic processes via in situ photoluminescence spectroscopy, thereby gaining information about the performance of the catalyst and the formation of intermediate products.

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Language(s): eng - English
 Dates: 2022-01-122022-04-042022-04-14
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.2c00098
 Degree: -

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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 13 (14) Sequence Number: - Start / End Page: 3217 - 3223 Identifier: ISSN: 1948-7185
CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185