在分层双氧化物中的梯度分布的Ni / Fe位点的室温合成,用于增强氧气进化反应反应
Jinghan Zhang1, Qiming Chen1, Pengwei Zhao1
1School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300354, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 18, 2024
概括
为氧演化反应 (OER) 开发了一种具有梯度活性位点分布的新硫合NiFe层状双氧化物 (LDH) 材料. 这种材料显示了增强的催化活性和稳定性,推动了非贵金属电催化剂研究.
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:
- -铁 (NiFe) 层状双氧化物 (LDH) 是氧化演化反应 (OER) 的非贵金属电催化剂.
- 在NiFe-LDH中实现精确控制活性位点分布仍然是提高催化性能的挑战.
研究的目的:
- 开发一种基于NiFe的新型材料,具有活跃站点的梯度分布,以提高OER性能.
- 引入一种简单的,室温空气诱导的策略来制造这种材料.
主要方法:
- 在室温下使用空气诱导策略制造硫合的Ni/Fe梯度分布式LDH (GD-NiFe LDH/S).
- 材料的形态,组成和电化学性质的表征.
- 在性介质和离子交换膜水电解仪中测试OER性能.
主要成果:
- 空气诱导的策略促进了Fe物种的迁移,创造了Ni/Fe梯度分布,并增强了Ni/Fe协同效应.
- GD-NiFe LDH/S表现出一种独特的松树状形态,具有超级水友性/气性,促进电解质透和气体释放.
- 优化的GD-NiFe LDH/S实现了较低的OER超电位 (234 mV在10 mA cm−2) 和在水电解仪 (1.90 V在1.0 A cm−2) 中的卓越性能.
结论:
- 一个简单的空气诱导策略使得可控的设计可以在LDH中进行活跃站点分布,以增强OER.
- 开发的GD-NiFe LDH/S材料显示出作为一种高效和稳定的非贵金属电催化剂的巨大潜力.
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