CeO的价值工程2 反氧调节器提高了Fe/Co双原子催化剂中的氧气电催化性能
Hengqi Liu1, Jinzhen Huang2,3, Shengyu Ma1
1School of Physics, Harbin Institute of Technology, Harbin, 150001, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 20, 2025
概括
双原子化碳催化剂对可充电的空气电池有很大的希望. CeO2的价值工程提高了催化剂的耐用性和活性,使其能够长期稳定运行.
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:
- 双原子化碳催化剂由于其双功能氧气电催化活性,对可充电的空气电池 (ZAB) 是有前途的.
- 在氧降解反应 (ORR) 和有限氧演化反应 (OER) 活动期间的耐久性问题阻碍了实际实施.
研究的目的:
- 解决ZAB空气电极的Fe/Co双原子催化剂 (FeCo-N-C) 的稳定性和活性问题.
- 通过CeO2氧化还原调节器的价值工程来提高FeCo-N-C催化剂的性能.
主要方法:
- 用CeO2的价值工程来创建一个氧化还原调节器.
- 复合FeCo-N-C使用工程 CeO2.2.
- 用FeCo-N-C/CeO2复合物作为ZAB中的空气电极的电化学表征.
主要成果:
- 通过快速的Ce4+/Ce3+氧化还原过程设计的CeO2在ORR过程中有效地清理氧化副产品,提高耐用性.
- 在OER过程中,CeO2相互作用加速了电子转移,降低了CO氧化还原潜力.
- 使用优化FeCo-N-C/CeO2的ZAB实现了335mWcm-2的最大功率密度,并保持了1000小时的稳定性.
结论:
- 将FeCo-N-C与价值工程CeO2复合为克服稳定性和活动限制提供了一个简单而有效的策略.
- 这种方法显著提高了可充电空气电池的空气电极的性能.
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