异质结
分解水
材料科学
光电子学
电荷(物理)
光电化学
光电化学电池
分离(统计)
工程物理
纳米技术
化学工程
光催化
电化学
化学
电极
计算机科学
催化作用
工程类
物理
电解质
生物化学
物理化学
量子力学
机器学习
作者
Angang Song,Yuheng Zhang,Zhixue Li,Junhua Hu
标识
DOI:10.1016/j.mseb.2024.117241
摘要
BiVO4/CuBi2O4 photoanodes were fabricated by depositing CuBi2O4 layers on top of BiVO4 layers while employing a solution-based deposition technique. Carrier separation and transfer are facilitated by the heterojunction that forms between BiVO4 and CuBi2O4, which significantly raises carrier density. Time-resolved photoluminescence (TRPL), UV–VIS absorption spectra, scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were employed for the characterization of the photoelectrode. The heterojunction photoelectrode demonstrated enhanced photoelectrochemical activity in comparison to BiVO4 alone, with the maximum photocurrent density of 1.15 mA/cm2 at 1.23 V vs. RHE. The improvement is attributed to decreased recombination of photo-generated electrons and holes and improved charge separation and transport in the heterostructure. By the generation of heterojunctions, the current work offers a new avenue for the design and construction of photoanodes with high charge separation efficiencies. This may be useful for the further enhancement of PEC water-splitting performances.
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