Dual-Channel Charge Manipulation for Enhancing Charge Separation and Transfer Kinetics in BiVO  4  Photoanodes

Shao, Mingshi; Hou, Shushi; Li, Xiang; Yang, Hao; Huang, Y. J.; Liu, Zhao‐Qing

doi:10.1021/acscatal.5c09177

articleACS CatalysisFeb 3, 2026Closed access

Dual-Channel Charge Manipulation for Enhancing Charge Separation and Transfer Kinetics in BiVO 4 Photoanodes

MSMingshi Shao SHShushi Hou XLXiang Li HYHao Yang YJY. J. Huang

Guangzhou University · Guangxi University · +1 more institution

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Abstract

This work presents a synergistic dual-modification strategy to engineer distinct pathways for electrons and holes. Terbium (Tb) doping establishes a bulk ″electron highway″ within BiVO4, enhancing charge separation efficiency. Concurrently, a solution-processed high-entropy oxyhydroxide (CoFeMoCuOOH) overlayer acts as a multifunctional “hole-trapping net”, accelerating surface reaction kinetics. The modified photoanode after optimization exhibits a 6.8 mA/cm2 photocurrent density, with stable performance at 1.23 V vs RHE. The enhancement mechanism is unraveled through density functional theory (DFT) calculations and in situ Raman spectroscopy. In situ Raman spectroscopy confirms the accumulation of holes at…

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Topics & keywords

Topics

Keywords

Overlayer
Density functional theory
Photocurrent
Catalysis
Raman spectroscopy
Electron transfer
Doping
Adsorption

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