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

Kramm, Ulrike I. and Zana, Alessandro and Vosch, Tom and Fiechter, Sebastian and Arenz, Matthias and Schmeißer, Dieter (2015):
On the structural composition and stability of Fe–N–C catalysts prepared by an intermediate acid leaching.
In: Journal of Solid State Electrochemistry, Springer-Verlag Berlin Heidelberg, pp. 1-13, ISSN 1432-8488, [Online-Edition: http://dx.doi.org/10.1007/s10008-015-3060-z],
[Article]

Abstract

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-57 Mößbauer 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.

Item Type: Article
Erschienen: 2015
Creators: Kramm, Ulrike I. and Zana, Alessandro and Vosch, Tom and Fiechter, Sebastian and Arenz, Matthias and Schmeißer, Dieter
Title: On the structural composition and stability of Fe–N–C catalysts prepared by an intermediate acid leaching
Language: English
Abstract:

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-57 Mößbauer 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.

Journal or Publication Title: Journal of Solid State Electrochemistry
Publisher: Springer-Verlag Berlin Heidelberg
Uncontrolled Keywords: Non-noble metal catalysts (NNMC,) Fe–N–C, ORR, PEM-FC, Accelerated stress tests (ASTs), Mößbauer spectroscopy
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Catalysts and Electrocatalysts
07 Department of Chemistry
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 01 Mar 2016 09:44
Official URL: http://dx.doi.org/10.1007/s10008-015-3060-z
Additional Information:

Dedicated to Jose Zagal on the occasion of his 65th birthday

Identification Number: doi:10.1007/s10008-015-3060-z
Funders: This work was supported by the European Fund for Regional Development (EFRE) at BTU Cottbus under the Project No. 1307513,, This work was supported by the German Research Foundation (DFG) within the initiative of the Graduate School of Excellence Energy Science and Engineering (ESE, GSC 1070) at TU Darmstadt and by the Danish Innovation Fund ("non-precious" project).
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