双原子位点对齐的d轨道能量水平在阳离子交换膜燃料电池中的氧降解反应催化剂
在PubMed上查看摘要
概括
此摘要是机器生成的。研究人员开发了一种新的FeCo-N/P-C催化剂,以克服离子交换膜燃料电池 (AEMFC) 氧降解反应 (ORR) 活动的限制. 这种新的催化剂绕过了传统的扩展关系,大大提高了AEMFC的业绩.
科学领域
- 电化学
- 材料科学
- 催化剂
背景情况
- 氧降解反应 (ORR) 的活性受到中间体之间的缩放关系的限制.
- 这种限制阻碍了离子交换膜燃料电池 (AEMFC) 的实际应用.
研究的目的
- 设计一种能够绕过传统ORR缩放关系的催化剂.
- 提高AEMFC电催化剂的活性和稳定性.
主要方法
- 通过原子 (P) 替代对齐Fe和C3dz2轨道能量水平.
- 定制了ORR路径以避免OOH*中间体.
- 使用FeCo-N/P-C作为电催化剂.
主要成果
- 在H2-O2下,在0.9V (无iR) 的电流密度达到251mA·cm-2.
- 在H2-空气下显示出0.805 W·cm-2的峰值功率密度.
- 经过10,000个电压周期的微不足道的降解,达到2025年能源部的目标.
结论
- 该FeCo-N/P-C催化剂有效地绕过了ORR缩放的限制.
- 这为AEMFC提供了具有竞争力的电催化剂和催化剂设计的新策略.
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