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O: Oberflächenphysik

O 28: Postersitzung (Elektronische Struktur, Grenzfläche fest-flüssig, Halbleiteroberflächen und -grenzflächen, Magnetismus und Symposium SYXM, Methodisches, Nanostrukturen, Oberflächenreaktionen, Teilchen und Cluster, Zeitaufgelöste Spektroskopie)

O 28.35: Poster

Mittwoch, 10. März 2004, 16:00–19:00, Bereich C

Growth of Platin Nanowire Networks on Nafion — •M. Elbahri, J. Franc, O.C. Aktas, R. Adelung, and F. Faupel — Lehrstuhl für Materialverbunde, Technische Fakultät der CAU Kiel

The Nafion polymer, produced by the Dupont company, is still the most prominent membrane material for the commercial polymer electrolyte fuel cell (PMFC). Usually, the Nafion membrane is sandwiched by two catalytic layers, consisting of a metal-Nafion-carbon mixture in order to provide catalytic activity as well as electrical and proton conductivity. It turns out that most of the Platinum doesn’t contribute to the catalytic efficiency, which increases the total cost for the PMFC-fuel cell. An alternative approach might be a catalytic layer formed by a Pt-nanowire network. We present here a strategy to deposit Pt in the form of a nanowire networks. Therefore we used sputter deposited Pt on a vacuum deposited amorphous carbon mask layer. We show different Pt-nanowire networks generated on the Nafion surface and discuss the mechanisms that tune the network parameters like nanowire dimensions and mesh width.

The authors thank the Technologiestiftung Schleswig-Holstein for supporting the project.