| Autor: |
Doris, Grumelli, Tim, Wiegmann, Sara, Barja, Finn, Reikowski, Fouad, Maroun, Philippe, Allongue, Jan, Balajka, Gareth S, Parkinson, Ulrike, Diebold, Klaus, Kern, Olaf M, Magnussen |
| Rok vydání: |
2020 |
| Zdroj: |
Angewandte Chemie (International ed. in English). 59(49) |
| ISSN: |
1521-3773 |
| Popis: |
Establishing the atomic-scale structure of metal-oxide surfaces during electrochemical reactions is a key step to modeling this important class of electrocatalysts. Here, we demonstrate that the characteristic (√2×√2)R45° surface reconstruction formed on (001)-oriented magnetite single crystals is maintained after immersion in 0.1 M NaOH at 0.20 V vs. Ag/AgCl and we investigate its dependence on the electrode potential. We follow the evolution of the surface using in situ and operando surface X-ray diffraction from the onset of hydrogen evolution, to potentials deep in the oxygen evolution reaction (OER) regime. The reconstruction remains stable for hours between -0.20 and 0.60 V and, surprisingly, is still present at anodic current densities of up to 10 mA cm |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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