Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface
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 m...
| Autores principales: | , , , , , , , , , , |
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| Formato: | Articulo Comunicacion |
| Lenguaje: | Inglés |
| Publicado: |
2020
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/127248 https://onlinelibrary.wiley.com/doi/10.1002/anie.202008785?__cf_chl_jschl_tk__=pmd_NJBLsJFYqAW_KRAEx01KFcpGyi6cJIU5hZ4O7RUljFQ-1635251321-0-gqNtZGzNAiWjcnBszQkR |
| Aporte de: |
| id |
I19-R120-10915-127248 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física Oxide surface structure Electrocatalysis Oxygen evolution reaction Magnetite single crystal Operando X ray surface diffraction |
| spellingShingle |
Ciencias Exactas Física Oxide surface structure Electrocatalysis Oxygen evolution reaction Magnetite single crystal Operando X ray surface diffraction Grumelli, Doris Elda Wiegmann, Tim Barja, Sara Reikowski, Finn Maroun, Fouad Allongue, Philippe Balajka, Jan Parkinson, Gareth S. Diebold, Ulrike Kern, Klaus Magnussen, Olaf M. Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface |
| topic_facet |
Ciencias Exactas Física Oxide surface structure Electrocatalysis Oxygen evolution reaction Magnetite single crystal Operando X ray surface diffraction |
| description |
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-2 and strongly affects the OER kinetics. We attribute this to a stabilization of the F<sub>3</sub>O<sub>4</sub> bulk by the reconstructed surface. At more negative potentials, a gradual and largely irreversible lifting of the reconstruction is observed due to the onset of oxide reduction. |
| format |
Articulo Comunicacion |
| author |
Grumelli, Doris Elda Wiegmann, Tim Barja, Sara Reikowski, Finn Maroun, Fouad Allongue, Philippe Balajka, Jan Parkinson, Gareth S. Diebold, Ulrike Kern, Klaus Magnussen, Olaf M. |
| author_facet |
Grumelli, Doris Elda Wiegmann, Tim Barja, Sara Reikowski, Finn Maroun, Fouad Allongue, Philippe Balajka, Jan Parkinson, Gareth S. Diebold, Ulrike Kern, Klaus Magnussen, Olaf M. |
| author_sort |
Grumelli, Doris Elda |
| title |
Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface |
| title_short |
Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface |
| title_full |
Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface |
| title_fullStr |
Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface |
| title_full_unstemmed |
Electrochemical Stability of the Reconstructed Fe<sub>3</sub>O<sub>4</sub>(001) Surface |
| title_sort |
electrochemical stability of the reconstructed fe<sub>3</sub>o<sub>4</sub>(001) surface |
| publishDate |
2020 |
| url |
http://sedici.unlp.edu.ar/handle/10915/127248 https://onlinelibrary.wiley.com/doi/10.1002/anie.202008785?__cf_chl_jschl_tk__=pmd_NJBLsJFYqAW_KRAEx01KFcpGyi6cJIU5hZ4O7RUljFQ-1635251321-0-gqNtZGzNAiWjcnBszQkR |
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