基于二维铁的金属有机框架的高密度原子级缺陷工程促进了氧和的进化反应
Xin Zhao1, Shixun Wang1, Yanhui Cao2
1Department of Materials Science and Engineering, and Center for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 30, 2024
概括
基于铁的金属有机框架 (Fe-MOFs) 的缺陷工程创建了不和的位置,以便有效地分水. 这项研究揭示了氧化氧化的形成,增强了氧化进化和进化反应.
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:
- 金属有机框架 (MOF) 是水分裂的有希望的电催化剂.
- 在催化过程中,MOFs的转化为金属氧化使活性位点的识别变得复杂,并影响稳定性.
研究的目的:
- 在二维Fe-MOF中设计缺陷,以创建高密度的原子级缺陷.
- 了解这些缺陷的作用和随后的电催化水分裂相变的作用.
主要方法:
- 针对二维Fe-MOF的故障工程.
- 在氧化演化反应 (OER) 过程中,in situ 里埃变换红外和拉曼光谱.
- 对OER和演变反应 (HER) 的电化学表征性能.
主要成果:
- 优化Fe-MOF表现出Fe协调数的变化和超过28%的不和Fe位点的形成.
- 现场研究显示,不和Fe位点的氧化,水分离,以及生成*OH中间体和Fe氧化.
- 发现氧化氧化铁的形成与HER机制相容,降低能量障碍.
结论:
- 在Fe-MOF中的缺陷工程促进了控制的相位转换到活性Fe氧化氧化物种.
- 优化的Fe-MOF电催化剂在OER和HER方面表现出色.
- 这项工作提供了对MOF结构,相位转换和电催化活性之间的相互作用的见解.
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