设计用于燃料电池的自然细胞启发的血质膜电极组件
Zhongliang Huang1, Changhong Zhan1, Yujia Yuan2
1State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Journal of the American Chemical Society
|June 17, 2025
概括
一种新的血红系因子策略通过创建"呼吸器质子转移链"来增强质子交换膜燃料电池 (PEMFC). 这提高了催化剂的活性和质量转移,大大提高了燃料电池应用的功率密度和寿命.
科学领域:
- 材料科学
- 电化学
- 化学工程
背景情况:
- 质子交换膜燃料电池 (PEMFC) 需要高效且耐用的膜电极组件 (MEAs).
- 目前以 (Pt) 为基础的MEA的低功率密度和寿命受到质量转移不良和氧降解反应 (ORR) 动力学缓慢的限制,特别是在超低的Pt负载下.
- 制定克服这些局限性的战略对于广泛实施PEMFC至关重要.
研究的目的:
- 引入一个Heme-cofactor策略,
- 呼吸过程中的质子转移链
- 为了提高PEMFC的性能.
- 提高Pt催化剂的催化活性和MEAs的质量转移效率.
- 在PEMFC中实现更高的功率密度和寿命,特别是在低Pt负载下.
主要方法:
- 在血红蛋白的启发下,将多功能合因子 (含有碳素和Fe2+组) 与Pt催化剂 (Pt/C,Pt3Co/C,PtCo) 集成.
- 实行了血红系因子策略,以创建一个
- 呼吸过程中的质子转移链
- 在MEA中.
- 评估了包括峰值功率密度 (PPD) 和质量活性 (MA) 在内的表现指标.
主要成果:
- 与对照组相比,Pt类型的血红刺激性MEA显著增强了PPD (50109%) 和MA.
- 基于PtCo的MEA具有0.1 mgPt cm-2的低Pt负荷,实现了3.8 W cm-2 (H2-O2) 和1.9 W cm-2 (H2-空气) 的记录PPD.
- 开发的MEA在1. 5A cm-2下稳定运行超过50天 (1250小时),MA保持率为93%.
结论:
- 血红系因子策略是提高PEMFC性能的一种普遍而有效的方法.
- 这一策略有效地提高了MEA中的Pt催化活性和质量转移效率.
- 这些结果突显了合因子策略在实用和高性能燃料电池应用中的潜力.
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