对阳极催化剂进行重新设计,以实现燃料电池的可持续生存
Keonwoo Ko1, Dongsu Kim2, Jiho Min1,3
1Graduate School of Energy Science and Technology (GEST), Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 15, 2024
概括
在多功能碳层 (MCL) 中使用纳米粒子的新阳极催化剂设计提高了聚合物电解质膜燃料电池 (PEMFC) 的耐用性. 这一突破可以在恶劣的操作条件下保护性能降低,延长系统的使用寿命.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 聚合物电解质膜燃料电池 (PEMFC) 在苛刻的运行条件下面临显著的性能下降,如燃料饥饿和频繁的启动/关闭周期.
- 当前的解决方案往往是具体的条件,缺乏一个基本的方法来提高整体系统的寿命.
- 膜电极组件的结构完整性对于持续的PEMFC运行至关重要.
研究的目的:
- 设计和研究一种新的阳极催化剂结构,以提高PEMFC的耐用性.
- 开发一个综合解决方案,同时解决多个恶劣的操作条件.
- 通过催化剂重新设计,提高PEMFC系统的使用寿命.
主要方法:
- 在多功能碳层 (MCL) 中封装的 (Pt) 纳米颗粒的阳极催化剂的开发.
- 该MCL的功能作为一个分子和Pt纳米颗粒的保护屏障.
- 在模拟恶劣运行条件下评估催化剂性能和耐用性.
主要成果:
- 该MCL有效地保护Pt纳米颗粒免受溶解和聚合.
- 在Pt纳米粒子表面保持了选择性氧化.
- 在各种恶劣条件下,膜电极组件的结构性恶化被显著抑制.
- 重新设计的催化剂表现出增强的稳定性和寿命.
结论:
- 重新设计阳极催化剂结构是提高PEMFC耐用性的有希望的策略.
- 多功能碳层 (MCL) 为常见的PEMFC运营挑战提供了一个基本的解决方案.
- 这种方法可以有效地最大限度地提高当前PEMFC系统的使用寿命.
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