聚合物二烯二氧化物在血酸盐光电极中的作用,以改善水氧化
Lili Gao1, Huan Chai1, Huilin Niu1
1State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|June 2, 2023
概括
这项研究将合聚合物,尿素连接的二胺聚合物 (PDI) 引入血光电极,通过减少电荷重组和增强孔利用,显著提高光电化学 (PEC) 水分裂效率.
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
- 可再生能源是可再生能源的来源.
背景情况:
- 界面电荷重组阻碍了光子能量在光电化学 (PEC) 水分裂中的使用.
- 基于血 (α-Fe2O3) 的光电极对PEC水分裂有希望,但受到表面电荷重组的影响.
研究的目的:
- 引入一种结合聚合物,尿素连接的二烯二胺聚合物 (PDI),以血为基础的光电极,以改善PEC的水分裂.
- 调查PDI在促进电荷分离,迁移和利用方面的作用.
- 通过表面修饰来提高Zr4+合α-Fe2O3 (Zr:Fe2O3) 光电极的性能.
主要方法:
- 合成PDI修饰的Zr:Fe2O3复合光电极.
- (Co2+) 与PDI的协调,以形成Co-PDI,用于增强孔挖掘.
- 在Co-PDI和Zr:Fe2O3.3之间形成II型异质连接.
- 使用光电流密度测量对光电极性能进行表征.
主要成果:
- 通过与Zr:Fe2O3上的Fe原子结合,PDI建立了电荷传输通道,加速了孔的分离和迁移.
- 通过抑制载体重组,PDI使表面状态变得无源.
- Co-PDI/Zr:Fe2O3光解极形成了II型异质连接,加速了孔的提取和利用.
- 优化的Co-PDI/Zr:Fe2O3光电极实现了2.17 mA cm−2.2的光电密度.
结论:
- 整合PDI和Co-PDI显著提高了用于PEC水分裂的基于血的光电极的性能.
- 结合聚合物为缓解界面电荷重组和改善光电化学系统中电荷载体动态提供了可行的策略.
- 这项工作展示了在先进的光电极设计中利用结合分子的潜力,以高效地生产太阳能燃料.
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