ELECTROCHEMICAL REDUCTION DOPING OF TiO2 NANOTUBES TO INCREASE THE EFFICIENCY OF PHOTOELECTROCHEMICAL WATER SPLITTING

N. A. Zos’ko; Зосько Н. А.; T. A. Kenova; Кенова Т. А.; O. P. Taran; Таран О. П.; A. M.  Zhizhaev; Жижаев А. М.

doi:10.31857/S042485702310016X

ELECTROCHEMICAL REDUCTION DOPING OF TiO2 NANOTUBES TO INCREASE THE EFFICIENCY OF PHOTOELECTROCHEMICAL WATER SPLITTING

作者: Zos’ko N.A.¹, Kenova T.A.¹, Taran O.P.¹^,2, Zhizhaev A.M.¹
隶属关系:
1. Institute of Chemistry and Chemical Technology FRC KSC SB RAS
2. Siberian Federal University
期: 卷 59, 编号 10 (2023)
页面: 610-616
栏目: Articles
URL: https://journal-vniispk.ru/0424-8570/article/view/141825
DOI: https://doi.org/10.31857/S042485702310016X
EDN: https://elibrary.ru/WEZEPP
ID: 141825

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TiO2 films being a 1D nanotube structure were obtained by electrochemical anodic oxidation of titanium foil. Electrochemical reduction activation of electrodes based on TiO2 nanotubes was carried out using the method of cyclic voltammetry (CV). The activated electrodes showed significantly higher current density and quantum efficiency of the photoelectrochemical water splitting compared to native TiO2 nanotubes. Electrochemical treatment of electrodes by the CV method leads to an increase in the photocurrent density from 4 to 14 times, depending on both the wavelength used and the applied potential. The analysis of electrochemical impedance spectra showed that the increase in the photoelectrochemical process performance is due to an increase in the charge transfer rate at the semiconductor/electrolyte interface, as well as improved electronic conductivity of the oxide layer, which contributes to better charge carrier separation and a decrease in their recombination rate.

关键词

TiO2 nanotubes, anodic oxidation, electrochemical doping, activation, photoelectrochemical activity, decomposition of water

参考

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