Wagner, Stephan ; Auerbach, Hendrik ; Tait, Claudia E. ; Martinaiou, Ioanna ; Kumar, Shyam C. N. ; Kübel, Christian ; Sergeev, Ilya ; Wille, Hans‐Christian ; Behrends, Jan ; Wolny, Juliusz A. ; Schünemann, Volker ; Kramm, Ulrike I. (2019)
Elucidating the Structural Composition of an Fe–N–C Catalyst by Nuclear‐ and Electron‐Resonance Techniques.
In: Angewandte Chemie International Edition, 58 (31)
doi: 10.1002/anie.201903753
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Fe-N-C catalysts are very promising materials for fuel cells and metal-air batteries. This work gives fundamental insights into the structural composition of an Fe-N-C catalyst and highlights the importance of an in-depth characterization. By nuclear- and electron-resonance techniques, we are able to show that even after mild pyrolysis and acid leaching, the catalyst contains considerable fractions of alpha-iron and, surprisingly, iron oxide. Our work makes it questionable to what extent FeN4 sites can be present in Fe-N-C catalysts prepared by pyrolysis at 900 degrees C and above. The simulation of the iron partial density of phonon states enables the identification of three FeN4 species in our catalyst, one of them comprising a sixfold coordination with end-on bonded oxygen as one of the axial ligands.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Wagner, Stephan ; Auerbach, Hendrik ; Tait, Claudia E. ; Martinaiou, Ioanna ; Kumar, Shyam C. N. ; Kübel, Christian ; Sergeev, Ilya ; Wille, Hans‐Christian ; Behrends, Jan ; Wolny, Juliusz A. ; Schünemann, Volker ; Kramm, Ulrike I. |
| Art des Eintrags: | Bibliographie |
| Titel: | Elucidating the Structural Composition of an Fe–N–C Catalyst by Nuclear‐ and Electron‐Resonance Techniques |
| Sprache: | Englisch |
| Publikationsjahr: | 9 Juni 2019 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Angewandte Chemie International Edition |
| Jahrgang/Volume einer Zeitschrift: | 58 |
| (Heft-)Nummer: | 31 |
| DOI: | 10.1002/anie.201903753 |
| URL / URN: | https://doi.org/10.1002/anie.201903753 |
| Kurzbeschreibung (Abstract): | Fe-N-C catalysts are very promising materials for fuel cells and metal-air batteries. This work gives fundamental insights into the structural composition of an Fe-N-C catalyst and highlights the importance of an in-depth characterization. By nuclear- and electron-resonance techniques, we are able to show that even after mild pyrolysis and acid leaching, the catalyst contains considerable fractions of alpha-iron and, surprisingly, iron oxide. Our work makes it questionable to what extent FeN4 sites can be present in Fe-N-C catalysts prepared by pyrolysis at 900 degrees C and above. The simulation of the iron partial density of phonon states enables the identification of three FeN4 species in our catalyst, one of them comprising a sixfold coordination with end-on bonded oxygen as one of the axial ligands. |
| Freie Schlagworte: | energy conversion, Fe-N-C catalysts, oxygen reduction reaction, spectroscopy |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Fachgruppe Katalysatoren und Elektrokatalysatoren 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > In-Situ Elektronenmikroskopie 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut |
| Hinterlegungsdatum: | 29 Mai 2020 07:37 |
| Letzte Änderung: | 12 Jun 2024 05:21 |
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