On the structural composition and stability of Fe–N–C catalysts prepared by an intermediate acid leaching

  • The development of highly active and stable non-noble metal catalysts (NNMC) for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEM-FC) becomes of importance in order to enable cost reduction. In this work, we discuss the structural composition as derived from Fe-57Mößbauer spectroscopy and X-ray diffraction, catalytic performance determined by a rotating (ring)disk electrode (RRDE) technique and stability evaluation of our Fe–N–C catalysts prepared by an intermediate acid leaching (IAL). The advantage of this IAL is given by a high density of active sites within the catalyst, as even without sulphur addition, an iron carbide formation and related disintegration of active sites are inhibited. In addition, our accelerated stress tests illustrate better stability of the sulphur-free IAL catalyst in comparison to the sulphur-added one.

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Metadaten
Author: Ulrike Ingrid Kramm, Alessandro Zana, Tom Vosch, Sebastian Fiechter, Matthias Arenz, Dieter SchmeißerORCiD
DOI:https://doi.org/10.1007/s10008-015-3060-z
ISSN:1432-8488
ISSN:1433-0768
Title of the source (English):Journal of Solid State Electrochemistry
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2016
Tag:Accelerated stress tests (ASTs); Fe–N–C; Mößbauer spectroscopy; Non-noblemetal catalysts (NNMC); PEM fuel cell (PEM-FC); oxygen reduction reaction (ORR)
Volume/Year:20
Issue number:4
First Page:969
Last Page:981
Comment:
1. ISSN: P
2. ISSN: E
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
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