质子交换膜燃料电池
扫描电子显微镜
膜电极组件
材料科学
介电谱
铂金
电极
电化学
催化作用
阴极
三元运算
化学工程
分析化学(期刊)
膜
能量色散X射线光谱学
复合材料
化学
电解质
色谱法
生物化学
物理化学
计算机科学
工程类
程序设计语言
作者
Shengchu Liu,Shang Li,Ruyi Wang,Yan Rao,Qing Zhong,Hong Kang,Mu Pan
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2019-01-01
卷期号:166 (16): F1308-F1313
被引量:22
摘要
In this paper, we evaluated the oxygen reduction reaction (ORR) activities of Pt/C, PtCo/C, and PtCoMn/C catalysts using charge-transfer resistance (R ct ) and ΔR ct onset voltage from electrochemical impedance spectroscopy as indicators in proton exchange membrane fuel cells (PEMFC) over a wide voltage range of 0.66 V∼0.95 V. ORR activity of the PtCoMn/C ternary alloy catalyst is higher than that of Pt/C over a large voltage range. A decal transfer method was used to prepare a membrane electrode assembly (MEA) with PtCoMn/C as a cathode catalyst. The cross-sectional micrograph of MEA-PtCoMn/C was characterized using scanning electron microscopy. A continuous ultrathin cathode catalyst layer that was 3 μm thick was successfully prepared. The performance of MEA-PtCoMn/C with an ultralow Pt loading of 0.147 mg/cm 2 was evaluated using the single cell test. The highest achieved power density of MEA-PtCoMn/C was 1.42 W/cm 2 . The corresponding amount of platinum was 0.1035 gPt/kW, which reaches the index of the Department of Energy (DOE).
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