双异质连接和纳米碗形态工程BiVO4光电极用于增强太阳能水分的光电极
Kexin Ren1, Jiayi Zhou1, Zihao Wu1
1Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Small (Weinheim an der Bergstrasse, Germany)
|September 1, 2023
概括
这项研究开发了一种新的BiVO4纳米碗光电极,具有双双BiOCl异质连接,用于高效的太阳能水分裂. 工程结构通过最大限度地减少电荷再组合,大大提高了的生产.
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:
- 光电化学 (PEC) 水分裂将太阳能转化为燃料.
- 光电极中的电荷重组限制了PEC效率.
- 开发高效的光电极极对于太阳能气生产至关重要.
研究的目的:
- 为了设计一个BiVO4 (BVO) 纳米碗 (NB) 异质连接光电极,提高PEC水分性能.
- 研究双重异质连接和纳米碗形态在改善电荷分离和光吸收方面的作用.
- 为了实现有效的太阳能转化为能.
主要方法:
- 使用纳米圈 lithography 和 in situ 转换制造 BVO/BiOCl NB 光电极.
- 实验性表征 (例如,光电流测量) 和理论模拟 (DFT计算).
- 对光吸收,载体扩散和电荷转移动态的分析.
主要成果:
- 与平面BVO相比,BVO/BiOCl NB光电极的光电流密度在1.23V时为3.38mA cm−2,增加了四倍.
- 实现了95.5%的优异散装电荷分离效率.
- 纳米碗形态增强了光吸收和减少载体扩散路径;双异质连接促进了电子传输.
结论:
- 集成的双异质连接和纳米碗形态工程策略在提高PEC性能方面非常有效.
- 开发的BVO/BiOCl NB光电极显示了有效的太阳能水分解的巨大潜力.
- 这项工作为设计用于可再生能源应用的先进光电极材料提供了洞察力.
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