Direct utilization of ethanol on ceria‐based anodes for solid oxide fuel cells
Direct utilization of ethanol on ceria‐based anodes for solid oxide fuel cells
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DOI：
10.1002/apj.182
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发表时间：
2009
影响因子：
1.8
通讯作者：
M. Cimenti;J. Hill
中科院分区：
文献类型：
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作者：
M. Cimenti;J. Hill
研究了固体氧化物燃料电池（SOFC）用CuCeO 2、CuZr0.35Ce0.65O2（ZDC）和Cu/RuZr0.35Ce0.65O2阳极对乙醇的直接利用。阳极是通过将硝酸盐前体浸渍在通过流延获得的氧化钇稳定的氧化锆（YSZ）多孔层上来制备的，而（La0.8Sr0.2MnO3−δ）LSM阴极是丝网印刷的。在氢气和乙醇中测试电池。用气相色谱仪监测出口气体组成，其显示几乎所有的乙醇被分解，主要为H2、CH 4、CO、H2O和C2 H4。CuCeO 2在乙醇中的最大输出功率分别为0.075和0.400 W/cm 2| YSZ| LSM和CuZDC| YSZ|分别为LSM。所有电池在酒精中比在氢气中更活跃，峰值性能出现在大约4小时后。也就是说，功率密度最初增加，达到峰值，然后下降。这种行为可能是碳沉积的结果，碳沉积最初导致阳极中电子电导率的改善，但后来导致活性位点的阻塞。氧化锆掺杂（在ZDC阳极中）导致更好的稳定性，此外，ZDC阳极的初始活性可以在暴露于加湿氢气约1小时后恢复，而二氧化铈阳极的初始活性不能恢复。钌（<0.5重量%）的添加通过延迟碳形成的开始而进一步改善了稳定性。版权所有© 2008科廷科技大学和约翰威利父子有限公司。
The direct utilization of ethanol was investigated in CuCeO2, CuZr0.35Ce0.65O2 (ZDC) and Cu/RuZr0.35Ce0.65O2 anodes for solid oxide fuel cells (SOFC). The anodes were prepared by impregnation with nitrate precursors on a porous layer of yttria-stabilized zirconia (YSZ) obtained by tape casting, while (La0.8Sr0.2MnO3−δ) LSM cathodes were screen-printed. The cells were tested in both hydrogen and ethanol. The outlet gas composition was monitored with a gas chromatograph, which showed that almost all the ethanol was decomposed, mainly to H2, CH4, CO, H2O and C2H4. The maximum power outputs obtained in ethanol were 0.075 and 0.400 W/cm2 on CuCeO2|YSZ|LSM and CuZDC|YSZ|LSM, respectively. All cells were more active in alcohol than in hydrogen with the peak performance occurring after approximately 4 h. That is, the power density initially increased, peaked and then decreased. This behavior was likely a consequence of carbon deposition that initially results in an improvement of the electronic conductivity in the anode but later results in the blocking of the active sites. Zirconia doping (in the ZDC anodes) resulted in better stability and, in addition, the initial activity of the ZDC anodes could be recovered after approximately 1 h of exposure to humidified hydrogen, whereas the initial activity of the ceria anodes could not be recovered. The addition of ruthenium (<0.5 wt%) further improved the stability by delaying the onset of carbon formation. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.