Kramm, Ulrike I. ; Herrmann-Geppert, Iris ; Behrends, Jan ; Lips, Klaus ; Fiechter, Sebastian ; Bogdanoff, Peter (2016)
On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR.
In: Journal of the American Chemical Society, 138 (2)
doi: 10.1021/jacs.5b11015
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Today, most metal and nitrogen doped carbon catalysts for ORR reveal a heterogeneous composition. This can be reasoned by a nonoptimized precursor composition and various steps in the preparation process to get the required active material. The significant presence of inorganic metal species interferes with the assignment of descriptors related to the ORR activity and stability. In this work we present a simple and feasible way to reduce the contribution of inorganic metal species in some cases even down to zero. Such catalysts reveal the desired homogeneous composition of MeN4 (Me = metal) sites in the carbon that is accompanied by a significant enhancement in ORR activity. Among the work of other international groups, our iron-based catalyst comprises the highest density of FeN4 sites ever reported without interference of inorganic metal sites.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Kramm, Ulrike I. ; Herrmann-Geppert, Iris ; Behrends, Jan ; Lips, Klaus ; Fiechter, Sebastian ; Bogdanoff, Peter |
| Art des Eintrags: | Bibliographie |
| Titel: | On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Januar 2016 |
| Verlag: | American Chemical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Chemical Society |
| Jahrgang/Volume einer Zeitschrift: | 138 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1021/jacs.5b11015 |
| URL / URN: | https://doi.org/10.1021/jacs.5b11015 |
| Kurzbeschreibung (Abstract): | Today, most metal and nitrogen doped carbon catalysts for ORR reveal a heterogeneous composition. This can be reasoned by a nonoptimized precursor composition and various steps in the preparation process to get the required active material. The significant presence of inorganic metal species interferes with the assignment of descriptors related to the ORR activity and stability. In this work we present a simple and feasible way to reduce the contribution of inorganic metal species in some cases even down to zero. Such catalysts reveal the desired homogeneous composition of MeN4 (Me = metal) sites in the carbon that is accompanied by a significant enhancement in ORR activity. Among the work of other international groups, our iron-based catalyst comprises the highest density of FeN4 sites ever reported without interference of inorganic metal sites. |
| 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 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie |
| Hinterlegungsdatum: | 02 Jan 2018 13:43 |
| Letzte Änderung: | 18 Aug 2021 08:22 |
| PPN: | |
| Sponsoren: | Financial support by the DFG funding of the Excellence Initiative, Darmstadt Graduate School of Excellence Energy Science and Engineering (GSC 1070), is gratefully acknowledged by U.I.K. |
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