Pd-YSZ composite cathodes for oxygen reduction reaction of intermediate-temperature solid oxide fuel cells
Pd-YSZ composite cathodes for oxygen reduction reaction of intermediate-temperature solid oxide fuel cells
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DOI：
10.1016/j.ijhydene.2011.03.132
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发表时间：
2011-07-01
影响因子：
7.2
通讯作者：
Jian, Li
中科院分区：
文献类型：
--
作者：
Liang, Fengli;Zhou, Wei;Jian, Li
采用常规的机械混合和浸渍法制备了Pd-Y(2)O(3)稳定的ZrO(2) （YSZ）复合阴极。在浸润的情况下，通过热分解和化学还原过程在YSZ支架上形成Pd颗粒。采用x射线衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）和电化学阻抗谱（EIS）对Pd-YSZ复合阴极的相结构、形貌和电化学性能进行了表征。机械混合Pd- ysz复合阴极由于Pd粒子的显著生长和零星分布而性能不佳。在850 ~ 600℃的温度范围内，渗透热分解法制备的5 wt.% Pd负载阴极的极化电阻最低，在0.042 ~ 1.5 ω cm(2)之间，这得益于纳米级Pd颗粒的形成和连接良好的Pd网络的存在。研究了Pd对渗透-热分解Pd- ysz复合阴极性能的影响，结果表明，5 wt.%的Pd负载具有最低的极化电阻。版权所有(C) 2011，氢能源出版有限责任公司由爱思唯尔有限公司出版。版权所有。
Pd-Y(2)O(3) stabilized ZrO(2) (YSZ) composite cathodes are prepared by conventional mechanical mixing and infiltration methods. In the case of infiltration, thermal decomposition and chemical reduction processes are used to form Pd particles on the YSZ scaffold. The phase structure, morphology and electrochemical performance of the Pd-YSZ composite cathodes are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and electrochemical impedance spectroscopy (EIS). The performance of mechanically mixed Pd-YSZ composite cathodes is inadequate due to significant growth and sporadical distribution of Pd particles. The 5 wt.% Pd-loaded cathode prepared by infiltration-thermal decomposition process shows the lowest polarization resistance, i.e. between 0.042 Omega cm(2) and 1.5 Omega cm(2) in the temperature range of 850-600 degrees C, benefited from the formation of nano-sized Pd particles and the presence of well connected Pd network. The effect of Pd loading on the performance of the infiltrated-thermal decomposed Pd-YSZ composite cathodes is also evaluated, 5 wt.% Pd loading results in the lowest polarization resistances. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.