Graphitised carbon nanofibres as catalyst support for PEMFC

Elina Yli-Rantala (Corresponding Author), Antti Pasanen, Pertti Kauranen, V. Ruiz, M. Borghei, E. Kauppinen, A. Oyarce, G. Lindbergh, C. Lagergren, M. Darab, S. Sunde, M. Thomassen, S. Ma-Andersen, E. Skou

    Research output: Contribution to journalArticleScientificpeer-review

    27 Citations (Scopus)

    Abstract

    Graphitised carbon nanofibres (G‐CNFs) show superior thermal stability and corrosion resistance in PEM fuel cell environment over traditional carbon black (CB) and carbon nanotube catalyst supports. However, G‐CNFs have an inert surface with only very limited amount of surface defects for the anchorage of Pt catalyst nanoparticles. Modification of the fibre surface is therefore needed. In this study Pt nanoparticles have been deposited onto as‐received and surface‐modified G‐CNFs. The surface modifications of the fibres comprise acid treatment and nitrogen doping by pyrolysis of a polyaniline (PANI) precursor. The modified surfaces were studied by FTIR and XPS and the electrochemical characterization, including long‐term Pt stability tests, was performed using a low‐temperature PEMFC single cell. The performance and stability of the G‐CNF supported catalysts were compared with a CB supported catalyst and the effects of the different surface treatments were discussed. On the basis of these results, new membrane electrode assemblies (MEAs) were manufactured and tested also for carbon corrosion by in situ FTIR analysis of the cathode exhaust gases. It was observed that the G‐CNFs showed 5 times lower carbon corrosion compared to CB based catalyst when potential reached 1.5 V versus RHE in simulated start/stop cycling.
    Original languageEnglish
    Pages (from-to)715-725
    Number of pages11
    JournalFuel Cells
    Volume11
    Issue number6
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed
    Event2nd CARISMA International Conference “Progress in MEA Materials for Medium and High Temperature Polymer Electrolyte Fuel Cells” - La Grande Motte, France
    Duration: 19 Jul 201022 Sep 2010

    Keywords

    • Carbon Corrosion
    • Carbon Nanofibres
    • Catalyst Stability
    • Catalyst Support
    • Proton Exchange Membrane Fuel Cell
    • Surface Modification

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