Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy

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	Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy
	W. H. Leng; Z. Zhang; J. Q. Zhang; C. N. Cao
	2005
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	109 期号:31 页码:15008-15023
摘要	In this paper, the electrochemical impedance spectroscopy (EIS) mathematical model of TiO2 photoelectrocatalytic (PEC) reactions involving charge transfer and recombination through surface states was developed. The model was used to study the kinetics of photoelectrocatalytic decomposition of salicylic acid. The model simulation results show that the appearance of two distinguishable semicircles in the EIS response depends on the charging of surface state and light intensity. The experimental results demonstrated that similar phenomena to the theoretical simulation results. The model provides a way to obtain the rate constants for the photoelectrochemical reactions of surface states mediating charge transfer and recombination. The applied potential changes not only the recombination rate constant but also the charge-transfer rate constant. Moreover, the experimental EIS results here and those previous published on PEC degradation reactions can be explained by the present model satisfactorily. The relevance of surface states was discussed briefly. The results demonstrated that EIS is a powerful tool for studying the kinetics of PEC decomposition of organic pollutants on TiO2 electrodes.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese acad sci, met res inst, state key lab corros & protect met, shenyang 11006, peoples r china.;leng, wh (reprint author), zhejiang univ, dept chem, yuquan campus, hangzhou 310027, peoples r china;lengwh@css.zju.edu.cn
关键词	Intensity-modulated Photocurrent Interfacial Electron-transfer Semiconductor-liquid Interfaces Titanium-dioxide Film Electrodes Salicylic-acid Steady-state Photocatalytic Degradation Water Photoelectrolysis Solar-cells
URL	查看原文
WOS记录号	WOS:000231042800038
引用统计	被引频次：437[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34894
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. H. Leng,Z. Zhang,J. Q. Zhang,et al. Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy[J]. Journal of Physical Chemistry B,2005,109(31):15008-15023.
APA	W. H. Leng,Z. Zhang,J. Q. Zhang,&C. N. Cao.(2005).Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy.Journal of Physical Chemistry B,109(31),15008-15023.
MLA	W. H. Leng,et al."Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy".Journal of Physical Chemistry B 109.31(2005):15008-15023.