Hannover 2010 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 8: Poster: Low Temperature Plasmas I

P 8.7: Poster

Dienstag, 9. März 2010, 16:00–18:00, Lichthof

Novel method to produce catalysts for oxygen reduction reaction by dual plasma process — •Christian Walter, Volker Brüser, and Klaus-Dieter Weltmann — INP Greifswald e.V. Felix-Hausdorff-Str. 2 17489 Greifswald

Polymer electrolyte membrane fuel cells (PEMFCs) have been recognised as a potential future power source for zero emission vehicles [1]. Today, Pt is the only efficient catalyst for the oxygen reduction reaction (ORR) in PEMFCs. But for reasons of availability and cost efficiency there is a great desire to replace Pt with inexpensive and abundant catalysts (Non-noble-metal catalysts (NNMCs)). Metal (Co/Fe)/N/C composites have emerged as the most promising alternatives within the NNMcs. Those composites are either prepared by pyrolisation of Co- or Fe-N₄-macrocycles at high temperatures in an inert atmosphere or by introducing the metal and the nitrogen precursors separately onto carbon support and subsequent pyrolisation [2]. But it has also been shown that metal-polymer-composites can be produced by a dual PECVD/PVD process [3]. In this contribution, such a dual process is used with pyrrole as the polymer and cobalt as metal to obtain catalytically active composites. Advantages and shortfalls of this technology are discussed.
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C.Walter et al.; Plasma Process. Polym.; 2009, 6, 803-812