在COF的协助下,建造了无菌质量充电通道,以促进高性能燃料电池的生产活动
Guobin Wen1, Liancheng Sun2, Yanzhou Qin2
1State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering Hunan University, Changsha, 410082, China.
Angewandte Chemie (International ed. in English)
|January 20, 2025
概括
多孔硫化共价有机框架 (COF) 通过创建高效的质量充电通道来提高燃料电池性能. 这提高了催化活性和功率密度,同时保持了稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 燃料电池中使用二维状材料来分散白金并减少贵金属的使用.
- 膜电极组件 (MEA) 堆叠层中的质量传输阻力导致设备故障和性能下降.
研究的目的:
- 为了增强氧降解反应 (ORR) 活性和燃料电池性能.
- 为了解决基于石墨烯的催化层的质量运输限制.
主要方法:
- 在基于石墨烯的催化层中植入多孔和刚性硫化共价有机框架 (COF).
- 构建固体质荷通道,以方便反应物和产品的运输.
- 通过旋转盘电极 (RDE) 测量和MEA设备测试来评估催化剂性能.
主要成果:
- 在RDE测试中COF修改后,正常化的质量活动增加了3.7倍,达到1.56A/mg_pt.
- 在MEA的最大功率密度达到1.015W/cm2 (22%的改进) 与COF结构.
- 燃料电池在10,000个稳定周期后,开放电路电压仅降低了0.8%.
结论:
- 开发的固体质量充电通道显著提高了ORR活动和燃料电池性能.
- 这种方法适用于各种催化剂,包括PtCo和商业Pt/C,显示出广泛的潜力.
- 在燃料电池催化剂中,COF的整合为克服大规模运输限制提供了一个有希望的策略.
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