Cu2O作为空穴提取层修饰BiVO4光阳极以增强电荷分离和转移
Cu2O as the hole extraction layer modified BiVO4 photoanode to enhance charge separation and transfer
田泽 1王振霞 1马自在 2李晋平 3王孝广4
作者信息
- 1. Laboratory of Advanced Materials and Energy Electrochemistry,Institute of New Carbon Materials,College of Material Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China
- 2. College of Chemistry,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China
- 3. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China
- 4. Laboratory of Advanced Materials and Energy Electrochemistry,Institute of New Carbon Materials,College of Material Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China
- 折叠
摘要
光生电荷的分离和转移被认为是影响BiVO4基光阳极光电性能的核心因素之一.本文设计了在BiVO4光阳极与析氧助催化剂之间插入空穴提取层的方法.Cu2O作为空穴提取层引入到助催化剂层(FeOOH/NiOOH)和BiVO4之间,可以有效优化空穴的迁移路径,延长光生空穴的寿命,从而提高电极的光电化学性能.与BiVO4相比,调整后的BiVO4/Cu2O/FeOOH/NiOOH光阳极的电荷分离效率从70.6％提高到了 92.0％.此外,该光阳极在1.23 VRHE (AM 1.5G照明下)下,还显示出了3.85 mA cm-2的高光电流密度,是BiVO4的2.77倍.我们的研究结果表明,电沉积Cu2O空穴提取层是一种简单且可扩展的方法,能够有效提高BiVO4的光电活性,可用于太阳能驱动水分解领域.
Abstract
Photoinduced charge separation and transfer are the core factors affecting the photoelectrochemical per-formance of BiVO4-based photoanodes.Herein,a hole ex-traction layer was inserted between a BiVO4 photoanode and an oxygen evolution cocatalyst(OEC).The introduction of Cu2O as a hole extraction layer between the OEC layer(FeOOH/NiOOH)and BiVO4 optimized the migration paths and extended the lifetimes of the photogenerated holes,thus enhancing the photoelectrochemical performance of the photoelectrode.The charge separation efficiency of the opti-mized BiVO4/Cu2O/FeOOH/NiOOH photoanode was 92.0％significantly higher than the 70.6％efficiency for pure BiVO4.As expected,this photoanode also displayed a high photo-current density of 3.85 mA cm-2 at 1.23 VRHE(under AM 1.5G illumination),which was 2.77 times greater than that of pure BiVO4.Our results indicate that electrodepositing a Cu2O hole extraction layer is a simple and scalable method for increasing the photoelectrochemical activity of BiVO4 photoanodes for solar water splitting.
关键词
BiVO4/Cu2O/hole extraction layer/solar wate splittingKey words
BiVO4/Cu2O/hole extraction layer/solar wate splitting引用本文复制引用
基金项目
National Natural Science Foundation of China(22008165)
National Natural Science Foundation of China(21878201)
Natural Science Foundation of Shanxi Province(202303021211035)
7th Youth Talent Support Program of Shanxi Province()
Opening Project of Sichuan University of Science and Engineering,Material Corrosion and Protection Key Laboratory of Sichuan(2021CL22)
出版年
2024
NETL
NSTL
万方数据