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On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR

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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