原子化集群的离子-液体合成作为双功能的氧气减少和进化反应 性气电池的电催化剂
Nannan Wang1, Jing Li1, Jinpei Hei1
1Key Laboratory of New Energy Conversion and Storage, Chaohu University, Hefei, 238000, China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|January 10, 2025
概括
这项研究增强了化 (MoN) 原子集群在添加碳上的能量转换. 改进的催化剂显示出出色的氧减和演化反应,提高了空气电池的性能.
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:
- 过渡金属化物 (TMN) 由于其电子性质和活性,是有前途的电催化剂.
- 一个主要的限制是TMN中活跃站点的稀缺性,阻碍了实际应用.
研究的目的:
- 通过在添加碳 (MoN@NC) 上创建原子分散的MoN集群来提高化 (MoN) 的电催化效率.
- 调查MoN@NC在氧气减少和演化反应以及空气电池中的性能.
主要方法:
- 使用湿度浸和离子液体方法合成MoN@NC电催化剂.
- 使用电化学测量来评估氧减少反应 (ORR) 和氧演化反应 (OER) 的性能.
- 使用合成的电催化剂制造并测试了空气电池.
主要成果:
- 在MoN@NC基板上实现了原子分散的MoN集群.
- 在ORR中表现出0.93V与RHE的令人印象深刻的发作潜力,在OER中表现出在10mA/cm2的295mV的过电潜力.
- 基于MoN@NC的空气电池表现出高功率密度 (151mW/cm2),高特异性放电容量 (759mAh/gZn),以及出色的循环稳定性 (>190个循环).
结论:
- 均分散的MoN原子集群是负责增强催化性能的主要活性位点.
- 在材料特性 (相位,结晶,集群分布,支孔隙,化温度) 和ORR性能之间建立了显著的相关性.
- 提供了优化战略的见解,以实现原子分散化物,以改善电催化应用.
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