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Investigation on the electrochemical removal of SO2 in ambient air for proton exchange membrane fuel cells

机译：Investigation on the electrochemical removal of sO2 in ambient air for proton exchange membrane fuel cells

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摘要

SO2, a pollutant in air, can cause a serious degradation of the proton exchange membrane fuel cell (PEMFC) performance. After direct exposure to 1 ppm SO2-air for 50 h, the cell voltage degraded by 28%. In order to cope with this problem, an electrochemical filter was fabricated and used for SO2 removal on-board in this study. The modified carbon felt was used as the filter anode. The effect of the applied voltages on the SO2 removal was investigated, and the cell performance was further tested both with and without the filter. When an external voltage of 0.5 V was applied across the filter, the cell voltage had no obvious decrease during the 240 h test, and cycle voltammery (CV) measurements showed that SO2 was not adsorbed on the cell cathode. The electrochemical filter successfully protected a single cell from being poisoned by 1 ppm SO2-air for more than 240 h. (C) 2012 Elsevier B.V. All rights reserved.
机译：SO2是空气中的污染物，会导致质子交换膜燃料电池（PEMFC）的性能严重下降。直接暴露于1 ppm SO2空气中50小时后，电池电压下降了28％。为了解决这个问题，本研究中制造了一种电化学过滤器，并用于机载SO2去除。改性碳毡用作过滤阳极。研究了施加电压对SO2去除的影响，并在有过滤器和无过滤器的情况下进一步测试了电池性能。当在过滤器上施加0.5 V的外部电压时，在240小时的测试中电池电压没有明显下降，循环伏安（CV）测量表明SO2没有吸附在电池阴极上。电化学过滤器成功地保护了单个电池免受1 ppm SO2空气中毒超过240小时。 （C）2012 Elsevier B.V.保留所有权利。

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