使用双单原子和纳米颗粒的双功能核心外催化剂的原子工程,以提高Zn-Air电池中的ORR和OER动力学
Yu-Hao Chang1, I-Hsuan Tseng1, Hamed Pourzolfaghar1,2
1Department of Chemical Engineering, National Chung Cheng University, Chia-Yi, 62102, Taiwan.
Small (Weinheim an der Bergstrasse, Germany)
|September 27, 2025
概括
一种新型的双功能催化剂,其中包括单个Fe和Co原子与碳框架中的Co纳米粒子,显著提高可充电空气电池的性能. 这种催化剂提供了优越的氧减和演化反应,使长期稳定的运行成为可能.
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:
- 可充电的空气电池 (RZAB) 需要高效的双功能催化剂来减少氧气 (ORR) 和氧气演变 (OER).
- 现有的催化剂经常面临挑战,即同时实现两种反应的高活性和稳定性.
研究的目的:
- 为RZABs开发一种具有增强ORR和OER性能的新型双功能催化剂.
- 研究单原子和纳米粒子催化剂的结构-活性关系,在一个层次性的多孔框架内.
主要方法:
- 核心合成和氨处理被用来创建一个碳框架 (NCF).
- 该NCF被单个Fe原子,单个Co原子和Co纳米粒子 (CoNP) 装饰,形成了A-Co-Fe/NCF-CoNP催化剂.
- 在RZAB配置中评估了电化学性能.
主要成果:
- A-Co-Fe/NCF-CoNP催化剂表现出极好的双功能活性,其ORR/OER潜在差距小,为0.69 V.
- 使用这种催化剂的RZAB实现了294mW cm-2的峰值功率密度.
- 异常的长期稳定性被证明,在灵活的RZAB中,在10 mA cm-2下运行了1129小时 (3340周期),在2 mA cm-2下运行了210小时 (620周期).
结论:
- 在RZAB应用中,A-Co-Fe/NCF-CoNP催化剂显示出显著的双功能活性,稳定性和耐用性.
- 设计的催化剂架构对推进储能技术具有很高的前景.
- 这项工作突出了单原子和纳米粒子集成在电化学能器件等级框架中的潜力.
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