动态Mo液和空位工程使HER和OER动力学在NiFe基催化剂中的协同作用,用于整体水电解
Wendi Zhang1, Yuxuan Xiao2, Lun Li1
1Institute of Applied Physics and Materials Engineering, University of Macau, Macao, SAR, 999078, China. huipan@um.edu.mo.
Materials horizons
|September 23, 2025
概括
这项研究引入了一种新的改性铁层双氧化催化剂 (NFM0.5-H),用于高效的整体水分裂 (OWS). 催化剂在工业生产中表现出极高的活性和耐用性.
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:
- 开发高效的非贵金属催化剂对于通过整体水分裂 (OWS) 来进行工业生产至关重要.
- 在演化反应 (HER) 和氧演化反应 (OER) 两方面平衡活性位点要求仍然是一个重大挑战.
研究的目的:
- 为高效的OWS设计和合成一个双功能催化剂.
- 调查合并和缺陷工程在提高催化性能方面的作用.
主要方法:
- 合成与结合的NiFe层状双氧化物 (NFM0.5-H).
- HER和OER活动的电化学表征.
- 在高电流密度下进行稳定性测试.
- 在性离子交换膜水电解器 (AEMWE) 中进行评估.
主要成果:
- 在10 mA cm-2.2时,NFM0.5-H对HER (40 mV) 和OER (230 mV) 呈现较低的超电位.
- 在 10 mA cm-2.0 时为 OWS 实现 1.51 V 的低电池电压.
- 显示出出色的长期稳定性,在500 mA cm-2下保持300多小时的性能.
- 摩酸液产生氧气空缺,增强活性部位和HER动力学.
结论:
- 在NiFe层状双氧化物中加入和缺陷工程为OWS创造了高度活跃和稳定的双功能催化剂.
- 在水电解中,NFM0.5-H具有重要的工业应用潜力.
- 该研究提供了对先进水分技术的合理催化剂设计的见解.
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