Analysis of electrocatalyst degradation in PEMFC caused by cell reversal during fuel starvation
Analysis of electrocatalyst degradation in PEMFC caused by cell reversal during fuel starvation
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DOI：
10.1016/j.jpowsour.2003.12.035
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发表时间：
2004-05-03
影响因子：
9.2
通讯作者：
Miyazaki, Y
中科院分区：
文献类型：
--
作者：
Taniguchi, A;Akita, T;Miyazaki, Y
通过单电池实验研究了质子交换膜燃料电池（PEMFC）在燃料不足的情况下运行期间电池反转造成的损坏。对来自降解膜电极组件 (MEA) 的样品进行了表征。通过能量色散 X 射线分析 (EDX) 对 MEA 样品的阳极催化剂层进行化学分析，清楚地表明钌从阳极催化剂颗粒中溶解。观察到严重的钌损失，特别是在燃料出口区域。通过 CO 溶出伏安法和对燃料电池性能恶化的测量发现，一氧化碳 (CO) 耐受性降低。还通过透射电子显微镜（TEM）分析和循环伏安法检测了烧结引起的阴极铂的表面积损失。 (C) 2004 Elsevier B.V. 保留所有权利。
The damage caused by cell reversal during proton exchange membrane fuel cell (PEMFC) operation with fuel starvation was investigated by a single cell experiment. The samples from degraded membrane-electrode assemblies (MEAs) were characterized. Chemical analysis of the anode catalyst layer of MEA samples by energy dispersive X-ray analysis (EDX) clearly showed ruthenium dissolution from the anode catalyst particles. Severe ruthenium loss was observed especially in the fuel outlet region. A reduced carbon monoxide (CO) tolerance was found by CO stripping voltammetry and measurement of deteriorated the fuel cell performance. Surface area loss of the cathode platinum by sintering was also detected by transmission electron microscopy (TEM) analysis and cyclic voltammetry. (C) 2004 Elsevier B.V. All rights reserved.