Dresden 2011 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 44: Functional Materials II
MM 44.11: Vortrag
Freitag, 18. März 2011, 13:00–13:15, IFW A
Novel method to produce catalysts for oxygen reduction re- action by dual plasma process — •Christian Walter1, Volker Bruser1, Antje Quade1, Klaus-Dieter Weltmann1, Kurt Kummer2, and Denis Vyalikh2 — 1INP Greifswald e.V. Felix-Hausdorff-Str. 2 17489 Greifswald — 2TU Dresden Inst. für Festkörperphysik Helmholtzstraße 10 01069 Dresden
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.
R. Bashyam and P. Zelenay; Nature, 2006, 443,63-66
F. Jaouen et al.; ACS Appl. Mater. Interfaces, 2009, 1 (8), 1623
C.Walter et al.; Plasma Process. Polym.; 2009, 6, 803-812