In-situ spin trap electron paramagnetic resonance study of fuel cell processes

文献情報

出版日 2004-04-28

DOI 10.1039/B404253K

インパクトファクター 3.676

著者

Alexander Panchenko, Herbert Dilger, Jochen Kerres, Martin Hein, Andreas Ullrich, Till Kaz, Emil Roduner

原文を見る

要旨

A novel method allows the monitoring of radical formation and membrane degradation in-situ in a working fuel cell which is placed in the microwave resonator of an electron paramagnetic resonance (EPR) spectrometer. By introduction of a spin trap molecule at the cathode the formation of immobilized organic radicals on the membrane surface is observed for F-free membranes, revealing the onset of oxidative degradation. For Nafion® there is much less evidence of degradation, and the hydroxyl radical is detected instead. At the anode, free radical intermediates of the fuel oxidation process are observed. No traces of membrane degradation are detected on this side of the fuel cell.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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