Intermetallic Fe6Ge5 formation and decay of a core–shell structure during the oxygen evolution reaction
| Autor: | Chittaranjan Das, Andrei V. Shevelkov, J. Niklas Hausmann, Roman A. Khalaniya, Prashanth W. Menezes, Matthias Driess, Ina Remy-Speckmann, Stefan Berendts |
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| Rok vydání: | 2021 |
| Předmět: |
In situ
Tafel equation Materials science Metals and Alloys Intermetallic Oxygen evolution General Chemistry Overpotential Catalysis Surfaces Coatings and Films Electronic Optical and Magnetic Materials Germanide Core shell chemistry.chemical_compound chemistry Chemical engineering Materials Chemistry Ceramics and Composites |
| Zdroj: | Chemical Communications. 57:2184-2187 |
| ISSN: | 1364-548X 1359-7345 |
| Popis: | Herein, we report on intermetallic iron germanide (Fe6Ge5) as a novel oxygen evolution reaction (OER) precatalyst with a Tafel slope of 32 mV dec−1 and an overpotential of 272 mV at 100 mA cm−2 in alkaline media. Furthermore, we uncover the in situ formation of a core–shell like structure that slowly collapses under OER conditions. |
| Databáze: | OpenAIRE |
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