Effect of CO gas and anode-metal loading on H2 oxidation in proton exchange membrane fuel cell
Effect of CO gas and anode-metal loading on H2 oxidation in proton exchange membrane fuel cell
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CO气体和阳极金属负载对质子交换膜燃料电池中H2氧化的影响
DOI：
10.1016/s0378-7753(01)00838-2
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Nagai
中科院分区：
文献类型：
--
作者：
Jae;Yong;Koichi Kobayashi;M. Nagai
采用交流阻抗法研究了质子交换膜燃料电池（PEMFC）中CO气体和阳极金属负载量对H2氧化的影响。为了研究这些影响，测量电压损失，并通过交流阻抗谱确定半电池（阴极侧：H2;阳极侧：模拟气体）和全电池（阴极侧：O2;阳极侧：模拟气体）的阻抗。CO气体对高频电弧中的电荷转移反应和中频电弧中的氢解离化学吸附有较大的影响，而对低频电弧中的氢解离化学吸附影响不大。在低金属负载量的燃料电池中，电荷转移和氢解离化学吸附的极化电阻大于高金属负载量的，并且随着CO浓度的增加而大大增加。虽然在高温下阴极阻抗是主要部分，与CO浓度无关（≤ 100 ppm），但在低温和高CO浓度下，全电池的阻抗取决于阳极阻抗。
The effect of CO gas and anode-metal loading on H2oxidation in a proton exchange membrane fuel cell (PEMFC) are investigated by ac impedance spectroscopy. To investigate these effects, the voltage loss is measured, and the impedance of the half-cell (cathode side: H2; anode side: simulated gas) and full-cell (cathode side: O2; anode side: simulated gas) are determined by ac impedance spectroscopy. The CO gas has a great effect on the charge-transfer reaction (high-frequency arc) and hydrogen dissociative chemisorption (medium-frequency arc), but little effect on the low-frequency arc. The polarization resistances for charge-transfer and hydrogen dissociative chemisorption in a fuel cell with low metal loading are larger than those with high metal loading, and increase greatly with increasing CO concentration. Although the cathode impedance is the main part at high temperature irrespective of CO concentration (≤100ppm), the impedance of the full-cell depends on anode impedance at low temperature and high CO concentration.