纳米棒
材料科学
纳米线
电解质
耐久性
阴极
化学工程
聚合物
膜
催化作用
电极
纳米技术
图层(电子)
膜电极组件
制作
碳纳米管
质子交换膜燃料电池
复合材料
燃料电池
化学
有机化学
物理化学
病理
工程类
医学
生物化学
替代医学
作者
Meihui Tan,Weiqi Zhang,Huiyuan Liu,Jie Zhang,Guo Zhang,Qiang Ma,Qian Xu,Khadijeh Hooshyari,Huaneng Su
出处
期刊:Fuel
[Elsevier]
日期:2024-02-01
卷期号:357: 130084-130084
被引量:3
标识
DOI:10.1016/j.fuel.2023.130084
摘要
For large-scale commercialization of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs), the issues of high Pt loading and unsatisfactory durability must be addressed. Disordered cathode catalyst layer (CL) with the random distribution of Pt/C electrocatalysts, binders, and pores is proved as one main reason for the motioned issues due to the limited Pt utilization efficiency, tortuous mass transport, and poor stability of Pt/C. Herein, we construct an ordered cathode CL consisting of in-situ grown Pt nanowires on the vertically aligned TiO2 nanorods array, coupled with carbon nanotubes as conductors to enhance the mass transfer characteristics and durability. In the single cell tests, the membrane electrode assembly (MEA) with ordered cathode CL achieves 3.53-fold Pt mass-specific peak power density compared to a conventional MEA. The Pt loading is only 20 % of the latter. Meanwhile, much better durability is confirmed. The superior performance and durability are attributed to the synergistic effects of ordered structure, stable TiO2 nanorods, one-dimensional features of Pt nanowires, and strong metal-support interaction between TiO2 and Pt. This work provides new insight into CL design and facile fabrication method of the ordered CL, which is of great significance for the large-scale application of HT-PEMFC.
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