A CU2O/TiO2 heterojunction thin film cathode for photoelectrocatalysis

被引：403

作者：

Siripala, W ^{[1
]}

Ivanovskaya, A ^{[1
]}

Jaramillo, TF ^{[1
]}

Baeck, SH ^{[1
]}

McFarland, EW ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2003年 / 77卷 / 03期

关键词：

photocatalyst; hydrogen; photoelectrode; heterojunction photocathode;

D O I：

10.1016/S0927-0248(02)00343-4

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A thin film heterojunction photocathode was developed consisting of 100 nm of n-type titanium dioxide (TiO2) cathode surface deposited on p-type cuprous oxide (Cu2O). The cuprous oxide was deposited electrochemically on Ti foil. A photocurrent of 0.7 mA/cm(2) (at -1 V bias) and an open circuit photovoltage of 460 mV were obtained under an illumination of 700 W/m(2). The photoresponse as a function of pH demonstrated that the TiO2 film protected the Cu2O underlayer against corrosion. These results suggest that using a simple and inexpensive heterostucture configuration, the corrosion limitations Of Cu2O alone may be overcome while maintaining a relatively high efficiency for photoelectrolysis. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：229 / 237

页数：9

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