Quantification of Redox Sites during Catalytic Propane Oxychlorination by Operando EPR Spectroscopy
| Autor: | Guido Zichittella, Javier Pérez-Ramírez, Yevhen Polyhach, Gunnar Jeschke, René Tschaggelar |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Alkane
chemistry.chemical_classification Reaction mechanism 010405 organic chemistry Chemistry propane oxychlorination Oxychlorination General Medicine General Chemistry alkane activation heterogeneous catalysis operando EPR spectroscopy reaction mechanism 010402 general chemistry Photochemistry Heterogeneous catalysis 01 natural sciences Redox Catalysis 0104 chemical sciences chemistry.chemical_compound Oxidation state Propane |
| Zdroj: | Angewandte Chemie. International Edition, 60 (7) |
| ISSN: | 1433-7851 1521-3773 0570-0833 |
| Popis: | Identification and quantification of redox‐active centers at relevant conditions for catalysis is pivotal to understand reaction mechanisms and requires development of advanced operando methods. Herein, we demonstrate operando EPR spectroscopy as an important technique to quantify the oxidation state of representative CrPO4 and EuOCl catalysts during propane oxychlorination, an attractive route for propylene production. In particular, we show for the first time that the space‐time‐yield of C3H6 correlates with the amount of Cr2+ and Eu2+ ions generated over the catalysts during reaction. These results provide a powerful strategy to gather quantitative understanding of selective alkane oxidation, which could potentially be extrapolated to other functionalization approaches and operating conditions. © 2020 Wiley‐VCH GmbH. Angewandte Chemie. International Edition, 60 (7) ISSN:1433-7851 ISSN:1521-3773 ISSN:0570-0833 |
| Databáze: | OpenAIRE |
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