Journal of Solid State Electrochemistry

, Volume 20, Issue 4, pp 969–981

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

  • Ulrike I. Kramm
  • Alessandro Zana
  • Tom Vosch
  • Sebastian Fiechter
  • Matthias Arenz
  • Dieter Schmeißer
Original Paper

DOI: 10.1007/s10008-015-3060-z

Cite this article as:
Kramm, U.I., Zana, A., Vosch, T. et al. J Solid State Electrochem (2016) 20: 969. doi:10.1007/s10008-015-3060-z

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.

Keywords

Non-noble metal catalysts (NNMC) Fe–N–C ORR PEM-FC Accelerated stress tests (ASTs) Mößbauer spectroscopy 

Supplementary material

10008_2015_3060_MOESM1_ESM.docx (631 kb)
ESM 1(DOCX 630 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Ulrike I. Kramm
    • 1
    • 4
  • Alessandro Zana
    • 2
  • Tom Vosch
    • 2
  • Sebastian Fiechter
    • 3
  • Matthias Arenz
    • 2
  • Dieter Schmeißer
    • 1
  1. 1.Department of PhysicsBTU Cottbus-SenftenbergCottbusGermany
  2. 2.Nano-Science Center, Department of ChemistryUniversity of CopenhagenCopenhagenDenmark
  3. 3.Institute for Solar FuelsLise-Meitner-Campus of the Helmholtz-Center BerlinBerlinGermany
  4. 4.Graduate School of Excellence Energy Science and Engineering, Departments of Chemistry and Materials- and Earth-ScienceTU DarmstadtDarmstadtGermany