兰诱导的梯度场在不对称的异构接口催化剂中,用于增强氧气电催化
Yihan Zhang1, Seulgi Jeong1, Jiwoo Park1
1KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
Advanced materials (Deerfield Beach, Fla.)
|September 8, 2025
概括
本研究介绍了一种使用 (La) 控制金属碳 (M-N-C) 催化剂中的原子运动的新方法. 这创造了一个稳定的催化剂,增强了氧气电催化剂的活性,并改进了空气电池.
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:
- 金属--碳 (M-N-C) 催化剂是氧气电催化剂中贵金属的有希望的替代品.
- 挑战包括无序的活性位点和由于合成过程中原子迁移而导致的耐久性差.
研究的目的:
- 开发一种战略,用于对M-N-C催化剂中的原子迁移进行定向控制.
- 设计一种稳定,高性能的异构接口催化剂,用于增强氧气电催化.
主要方法:
- 加入一种外来金属 (La) 来利用Kirkendall效应进行定向原子扩散.
- 制造一个不对称的多相异相接口催化剂 (LaN/LaFe-NC).
主要成果:
- 实现了对原子扩散的定向控制,创造了明确的,不对称的活性点.
- 拉恩/拉费-NC催化剂表现出增强的界面电荷传输和改善的内在活性和稳定性.
- 在可充电Zn-空气电池中表现出卓越的性能,具有高功率密度 (211 mW cm−2) 和长周期稳定性 (>240 h).
结论:
- 建立了强大的异质接口催化剂的可概括的原子级设计策略.
- 这些发现为推进可再生能源转换和储存系统提供了有价值的见解.
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