雅恩-泰勒效应
载流子
兴奋剂
表面光电压
分解水
材料科学
析氧
密度泛函理论
纳米棒
电子空穴
电化学
电子
纳米技术
光电子学
化学物理
化学
光谱学
离子
电极
催化作用
物理化学
光催化
计算化学
物理
有机化学
生物化学
量子力学
作者
Peng-Peng Tang,Xinyu Zhang,Jiantao Zai,Jie‐Sheng Chen,Wei Zhang,Wei Xiao
标识
DOI:10.1021/acs.jpcc.2c08535
摘要
In this work, TiO2 nanoarray photoanodes with Cu2+ incorporation inside the lattice were synthesized by a facile hydrothermal method to improve its low utilization efficiency of the photogenenrated carrier limited by rapid charge recombination. With the effect of Jahn–Teller distortion, greater optimization of material geometry and electronic sturctures was achieved, which helped to realize better photoelectrochemical performance in the netural Na2SO4 solution for water oxidation. Density functional theory calculations also confirm the charge accumulation within the lattice of Cu-doped TiO2, meaning more efficient seperation and migration of the photogenerated electron–hole pairs. Meanwhile, with field-induced surface photovoltage spectroscopy analysis, the role of defect levels played in the electron–hole pair microdynamics can be understood, which manifest the behavior of carriers with its electron-trapped effect. Therefore, this work will offer a novel insight into achieving highly photoelectrochemical efficiency for oxygen evolution reaction by affecting electron–hole separation and migration at the atomic level.
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