在质子交换膜燃料电池中的Linker集团定向高质量活动Fe-N-C阴极
Zhechen Fan1, Shuhu Yin2, Wenhao Miao3
1School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|January 8, 2026
概括
我们开发了一种新的氧功能化铁碳 (O-FeNC) 催化剂,可以显著提高质子交换膜燃料电池 (PEMFC) 的性能. 这种无PGM的催化剂超过了能源部的目标,并显示了工业的可扩展性.
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:
- 原子分散的Fe-N-C催化剂是用于质子交换膜燃料电池 (PEMFCs) 的基金属 (PGM) 催化剂的有希望的替代品.
- 膜电极组件 (MEA) 的活性位点利用不足限制了它们的性能.
- 开发高效和成本效益的催化剂对于广泛采用PEMFC至关重要.
研究的目的:
- 开发一种高质量活性氧功能化铁--碳 (O-FeNC) 催化剂,可提高PEMFC的位点密度和利用率.
- 研究碳基 (CO) 基在促进FeN4位点密度和界面对齐中的作用.
- 评估开发的O-FeNC催化剂的电化学性能和可扩展性.
主要方法:
- 合成含有碳基的O-FeNC催化剂.
- 催化剂结构和活性位点的表征.
- 在PEMFC中进行电化学测试,包括电流密度和功率密度测量.
- 对离子分子纳米相分离和氧气透的评估.
主要成果:
- O-FeNC催化剂实现了高位密度和利用率,超过了美国能源部的2025年目标,电流密度为66.45mA cm-2在0.90V的无iR状态下.
- 质量活动比商业Pt/C高了59%.
- 实现了1.8W cm-2 (H2O) 和0.93W cm-2 (H2空气) 的峰值功率密度.
- 格拉姆尺度合成和500W的无PGM阴极堆原型证明了工业可扩展性.
结论:
- 碳基组有效地促进FeN4位点密度和界面对齐,提高催化剂性能.
- O-FeNC催化剂为PEMFCs提供了一个可行的,高性能,无PGM的替代品.
- 证明的可扩展性表明燃料电池技术的商业应用潜力.
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