Characterization of photoelectrochemical cells for water splitting by electrochemical impedance spectroscopy

被引：261

作者：

Lopes, Tania ^{[1
]}

Andrade, Luisa ^{[1
]}

Ribeiro, Helena Aguilar ^{[1
]}

Mendes, Adelio ^{[1
]}

机构：

[1] Univ Porto, Fac Engn, LEPAE, P-4200465 Oporto, Portugal

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 20期

关键词：

Hydrogen; Water splitting; PEG cells; Electrochemical impedance spectroscopy; Electrical analogs; HYDROGEN-PRODUCTION; SOLAR; DYE; CONVERSION; HEMATITE; FILMS;

D O I：

10.1016/j.ijhydene.2010.04.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocurrent-voltage characteristic of a photoelectrochemical cell for solar hydrogen production via water splitting, using undoped-hematite as photoanode, was obtained. Photoelectrochemical characteristics of the cell were also investigated by electrochemical impedance spectroscopy. Both techniques were carried out in the dark and under illumination. The analysis of the frequency spectra for the real and imaginary parts of the complex impedance allowed obtaining equivalent electrical analogs for the PEG cell operating in the dark and under 1 sun simulated illumination. Additionally, different electrode configurations were used (two and three-electrode arrangements). The two-electrode configuration allowed the study of the overall charge transfer phenomena occurring at the semiconductor, within the electrolyte and at the counter-electrode side of the cell, whereas the three-electrode configuration gave more detailed information concerning the double charged layer at the semiconductor/electrolyte interface. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：11601 / 11608

页数：8

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