铁酸盐/酸盐在泡上的双重重建,氧气进化反应的动态不同
Kaiwen Tan1,2, Jingyu Zhang1, Xinghan Liu2
1School of Materials Science and Engineering, Central South University, 410083 Changsha, P.R. China.
The journal of physical chemistry letters
|August 11, 2025
概括
泡上的铁酸盐/酸盐在氧化演化反应中经历双重重建. 调整该比率可以优化NiFe (氧) 氧化物活性位点,从而提高催化活性和稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 众所周知,铁 (NiFe) 预催化剂在氧化演化反应 (OER) 中重建成NiFe (氧) 氧化物.
- 这个重建过程的精确机制和动态仍然不完全理解.
- 开发高效和稳定的OER电催化剂对于能源转换技术至关重要.
研究的目的:
- 调查OER期间泡 (FPmM/NF) 上铁酸盐/酸盐的双重建力学.
- 了解酸盐/酸盐比率的调整如何影响重建过程和由此产生的活性站点.
- 为了将重建的NiFe (氧) 氧化物的结构和形态特性与其OER性能相关联.
主要方法:
- 在泡上合成铁酸盐/酸盐 (FPmM/NF) 通过共降.
- 电化学激活和氧化演化反应 (OER) 测试.
- 催化剂形态,结构和缺陷部位 (例如氧气空缺) 的表征.
主要成果:
- 酸盐和酸盐离子都经历离子交换,这表明在激活过程中发生了双重建构.
- 酸盐与酸盐的比例显著影响了重建动态,形态和OER活动.
- 最佳的FP7M/NF激活催化剂表现出纳米粒子形态,结构混乱和丰富的氧气空缺.
- 优化的催化剂实现了异常的OER活性 (175 mV在50 mA·cm−2) 和稳定性.
结论:
- 这项研究阐明了基于NiFe的预催化剂中双离子的不同重建动态.
- 调整阳离子比为控制活性NiFe (氧) 氧化位的形成提供了一种可行的策略.
- 优化的催化剂在氧气演化反应中表现出卓越的性能,突出了结构控制和缺陷工程的重要性.
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