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  Investigation of Synergistic Effects between Co and Fe in Co3-xFexO4 Spinel Catalysts for the Liquid-Phase Oxidation of Aromatic Alcohols and Styrene

Waffel, D., Budiyanto, E., Porske, T., Büker, J., Falk, T., Fu, Q., et al. (2020). Investigation of Synergistic Effects between Co and Fe in Co3-xFexO4 Spinel Catalysts for the Liquid-Phase Oxidation of Aromatic Alcohols and Styrene. Molecular Catalysis, 498(12): 111251. doi:10.1016/j.mcat.2020.111251.

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 Creators:
Waffel, Daniel1, Author
Budiyanto, Eko2, Author              
Porske, Thomas1, Author
Büker, Julia1, Author
Falk, Tobias1, Author
Fu, Qi1, Author
Schmidt, Stefan1, Author
Tüysüz, Harun2, Author              
Muhler, Martin1, 3, Author
Peng, Baoxiang1, 3, Author
Affiliations:
1Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44780 Bochum Germany, ou_persistent22              
2Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
3Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34 – 36, 45470 Mülheim a. d. Ruhr Germany, ou_persistent22              

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Free keywords: Liquid-phase oxidation; Comparative study; Spinel catalyst; Co3O4; Synergistic effect
 Abstract: Transition metal oxides are attractive catalyst alternatives in liquid-phase oxidation reactions due to their lower cost and higher abundance compared with conventional noble metal catalysts. We investigated the catalytic properties of a systematic series of Co3-xFexO4 spinel catalysts synthesized by a hard-templating method, which were applied in the liquid-phase oxidation of styrene, benzyl alcohol and cinnamyl alcohol. O2 and tert-butyl hydroperoxide (TBHP) were used as the oxidants in a comparative manner. For alcohol oxidation, TBHP leads to similar or slightly higher selectivity to the corresponding aldehydes compared with O2. For the activation of C=C bonds, TBHP favors the oxidative cleavage pathway, while O2 favors the epoxidation pathway. The comparison of the catalytic performance revealed that the activity of Co3O4 does not benefit from Fe doping using O2 as the oxidant, while the substitution of Fe ≤ 10 % in the spinel structure is beneficial when TBHP is used. This is attributed to the different activation mechanisms of the oxidizing agents, being spin transfer in case of O2 and partial decomposition in case of TBHP. Heterogeneity tests and reusability studies demonstrated the stability of the spinel catalysts.

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Language(s): eng - English
 Dates: 2020-06-252020-10-162020-12-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.mcat.2020.111251
 Degree: -

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Title: Molecular Catalysis
  Abbreviation : Mol. Catal.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 498 (12) Sequence Number: 111251 Start / End Page: - Identifier: ISSN: 2468-8231
CoNE: https://pure.mpg.de/cone/journals/resource/2468-8231