Free-standing and ionomer-free 3D platinum nanotrough fiber network electrode for proton exchange membrane fuel cells
Free-standing and ionomer-free 3D platinum nanotrough fiber network electrode for proton exchange membrane fuel cells
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用于质子交换膜燃料电池的独立式无离聚物 3D 铂纳米槽纤维网络电极
DOI：
10.1016/j.apcatb.2021.120504
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发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
Zhigang Shao
中科院分区：
文献类型：
--
作者：
Manman Qi;Yachao Zeng;Ming Hou;Yong Gou;Wei Song;Haiping Chen;Gang Wu;Zhenghao Jia;Yanyan Gao;Hongjie Zhang;Zhigang Shao
本文中，开发了具有低Pt负载量和增强的耐久性的纳米槽状催化剂层（NTCL）直接作为质子交换膜燃料电池（PEMFC）的阴极。受益于仿生结构和陶瓷厚度，阴极中反应物的质量传输和水管理显著增强。当阴极中Pt的负载量为42 μg cm-2时，获得了0.936 W cm-2的峰值功率密度。此外，通过环境扫描电子显微镜（ESEM）对NTCL上水分形成的原位观察，验证了有效的水分管理。重要的是，在加速应力测试期间，Pt NTCL阴极比传统电极稳定得多。增强的耐久性可归因于自我修复机制，其涉及Pt溶解和再沉积，赋予NTCL突出的鲁棒性。这项工作突出了一种新的方法来制备和理解纳米结构的Pt电极，增强性能和耐久性的PEMFC。
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−2is achieved with a Pt loading of 42 μg cm−2in 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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影响因子：
22.1
作者：
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通讯作者：
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影响因子：
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影响因子：
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影响因子：
27.8
作者：
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