质子交换膜燃料电池
阴极
材料科学
耐久性
离聚物
电极
铂金
化学工程
燃料电池
膜电极组件
扫描电子显微镜
溶解
复合材料
催化作用
电解质
纳米技术
化学
聚合物
工程类
物理化学
生物化学
共聚物
作者
Manman Qi,Yachao Zeng,Ming Hou,Yong Gou,Wei Song,Haiping Chen,Gang Wu,Zhenghao Jia,Yanyan Gao,Hongjie Zhang,Zhigang Shao
标识
DOI:10.1016/j.apcatb.2021.120504
摘要
Herein, a nanotrough-like catalyst layer (NTCL) with low Pt loading and enhanced durability was developed directly as the cathode for proton-exchange membrane fuel cells (PEMFCs). Benefiting from the biomimetic architecture and ultrathin thickness, the mass transport of reactants and water management in the cathode are significantly enhanced. A peak power density of 0.936 W cm−2 is achieved with a Pt loading of 42 μg cm−2 in the cathode. Besides, the in-situ observation of water formation on the NTCL by the environmental scanning electron microscopy (ESEM) verified the efficient water management. Importantly, the Pt NTCL cathode is far more stable than the conventional electrode during the accelerated stress tests. The enhanced durability may be attributed to a self-healing mechanism, which involves Pt dissolution and re-deposition, endowing the NTCL with outstanding robustness. This work highlights a new approach to preparing and understanding nanostructured Pt electrodes with enhanced performance and durability for PEMFCs.
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