电子沉积铁--基 (氧) 氧化物,以揭示有效的氧化进化过程中至关重要的铁物种
Xinyue Li1, Cuiyan Li2,3, Guizeng Liang1
1State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China.
ACS applied materials & interfaces
|March 14, 2026
概括
铁,和 (氧) 氧化物对氧演化反应 (OER) 显示出前景. 将铁引入或结构可以通过优化电子特性来增强OER活动和稳定性.
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:
- 基于铁 (Fe), (Co) 和 (Ni) 的催化剂对氧演化反应 (OER) 是有前途的.
- 催化活性通常受到重建 (氧) 氧化物表面的界面效应的影响,使结构-活性关系研究复杂化.
- 了解活跃网站的电子微环境对于优化OER性能至关重要.
研究的目的:
- 直接构建双金属Fe-Co-Ni基 (氧) 氧化物使用电解.
- 为了研究 Fe 纳入对基于 Co 和 Ni 的催化剂电子结构和 OER 活性的影响.
- 阐明在含有Fe的双金属系统中提高OER性能背后的机制.
主要方法:
- 双金属Fe-Co-Ni (氧) 水氧化物 (FeNiOOH,FeCoOOH,NiCoOOH) 的电解.
- 在现场表征技术.
- 理论计算 (例如,DFT).
主要成果:
- 通过Fe-O-Ni/Co桥梁将Fe纳入CoOOH或NiOOH引发了从Co/Ni到Fe的电子转移.
- FeNiOOH和FeCoOOH显示出一个降低的潜力 (约. 与NiCoOOH相比,0.12V在300 mA cm−2) 的电压和增强的稳定性.
- 在Fe-O-Ni/Co桥梁中的电子穿降低了电荷转移阻力,并促进了*OOH中间吸附.
- 富含电子的Fe物种充当了活性位点,优化了邻近的Ni/Co物种的电子结构.
结论:
- 双金属Fe-Co-Ni (氧) 氧化物提供了对OER活性和稳定性的协同增强.
- 电子微环境,特别是由Fe促进的电子转移,是提高催化性能的关键.
- 这项研究提供了通过操纵接口和电子效应来设计高效的电催化剂的见解.
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