共同调整Fe的d频段中心以加速质子合,以实现高效的氧气电催化
Pengxiang Zhang1,2, Shuling Liu2, Jingjing Zhou1
1College of Science, Henan Agricultural University, 63 Agriculture Road, Zhengzhou, 450002, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 10, 2023
概括
在铁化物中化增强了氧减少和演化反应的电催化活性. 这种新的催化剂设计提高了空气电池的双功能性能.
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:
- 调节过渡金属催化剂的d波段中心对于推进氧化转化反应至关重要.
- 在速度决定步骤中的质子合往往会阻碍电催化效率.
研究的目的:
- 为了增强铁化物 (FeP) 催化剂的电催化活性,用于氧减少反应 (ORR) 和氧演化反应 (OER).
- 调查 (Co) 兴奋剂对FeP电子结构和催化性能的影响.
- 为能源应用开发高效的基于碳的双功能催化剂.
主要方法:
- 对铁化物 (FeP) 进行化,以修改Fe d带的中心.
- 使用N-doped木材衍生的碳作为支持.
- 在现场表征以研究反应期间的活性位点.
- 电化学测试用于ORR和OER性能评估.
- 液态空气电池的组装和测试.
主要成果:
- 在Co-doped FeP (CoFeP NPs) 中优化的Fe位点通过促进水解离来加速ORR的质子合.
- 在现场生成的Fe站点优化了OER与氧相关的中间吸附.
- 实现了优越的ORR活动 (半波电位为0.88V) 和OER活动 (超电位为300mV在10mA cm-2时).
- 在液态空气电池中证明了800小时 (2400个周期) 的卓越循环稳定性.
结论:
- 兴奋剂有效调节FeP催化剂中的Fe位点的d频段中心.
- 开发的CoFePNP对ORR和OER都表现出异常的双功能催化活性.
- 这项研究为设计用于储能和转换设备的先进碳基电催化剂提供了一种新的策略.
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