构建具有可调节电子性能的金属有机框架膜在血酸盐光电极上,以促进光生成载体运输
Xiu-Shuang Xing1, Xuyang Zeng1, Shaolong Wu2,3
1International Joint Laboratory of Henan Photoelectric Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|August 5, 2024
概括
用FeNi-NH2BDC金属有机框架修改的血酸盐光电极极显著提高了光电化学水分裂效率. 这种增强源于改善的载体传输和减少的重组,实现了2.33倍高的光电流密度.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 黑马 (α-Fe2O3) 是光电化学水分裂 (PEC-WS) 的一个有前途的材料.
- 低光生成载体分离效率阻碍了其应用.
- 电子结构的修改是提高PEC-WS性能的关键.
研究的目的:
- 为了增强α-Fe2O3光电极的电子结构和载体运输.
- 为了提高PEC-WS的光生成载体分离效率.
- 研究具有功能化有机链接器的双金属金属有机框架 (MOF) 对α-Fe2O3性能的影响.
主要方法:
- 合成的双金属Fe/Ni MOF与具有不同功能组 (H,Br,NO2,NH2) 的铁酸连接器.
- 使用这些MOF修改的α-Fe2O3光电极.
- 进行光电化学 (PEC) 分析以评估性能.
主要成果:
- 用FeNi-NH2BDC MOF修改的α-Fe2O3光电极表现出在1.23 VRHE时的光电密度为2 mA cm−2,比纯的α-Fe2O3.3增加了2.33倍.
- 双金属Fe/Ni协同作用提高了导电性,并抑制了载体重组.
- -NH2组有效调节电子分布和带结构,延长光生成孔的寿命.
结论:
- FeNi-NH2BDC MOF修改显著提高了PEC-WS的α-Fe2O3光电极性能.
- 双金属协同作用和功能组修饰是提高光电极效率的有效策略.
- 这种方法为高效的太阳能水分解提供了先进材料的途径.
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