Synthesis of novel Cu2O micro/nanostructural photocathode for solar water splitting

被引：103
作者：
Hsu, Yu-Kuei [1 ]
Yu, Chun-Hao [1 ]
Chen, Ying-Chu [2 ]
Lin, Yan-Gu [3 ]
机构：
[1] Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien 97401, Taiwan
[2] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan
[3] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA
来源：
ELECTROCHIMICA ACTA | 2013年 / 105卷
关键词：
Cuprous oxide; Photoelectrochemical; Hydrogen Generation; Water splitting; THIN-FILMS; PHOTOELECTROCHEMICAL ACTIVITY; CUO; FABRICATION;
D O I：
10.1016/j.electacta.2013.05.003
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The hierarchical p-type Cu2O micro/nanostructural film on copper foil is successfully fabricated via a facile and cost-effective template route through transformation of lotus-like CuO/Cu(OH)(2) nanosheet/nanowire structure for photoelectrochemical (PEC) hydrogen generation. Various size of Cu2O micro/nanostructure transfers from CuO nanosheets and Cu(OH)(2) nanowires by means of thermally reducing the oxides from Cu2+ to Cu1+ at temperature of 500 degrees C under nitrogen atmosphere. Mott-Schottky plot shows the flat band potential of the hierarchical Cu2O film to be -0.17 V vs. Ag/AgCl and a hole concentration of 5.7 x 10(19) cm(-3). Direct band gap of 2.03 eV in Cu2O film is determined via incident photon-to-electron conversion efficiency measurement. Significantly, this Cu2O hierarchical photocathode exhibits remarkable photocurrent of -1.6 mA cm(-2) at a potential of -0.6V vs. Ag/AgCl, corresponding to the solar conversion efficiency of 1.97%. These results demonstrate the Cu2O micro/nanostructural film have great potential in solar hydrogen applications. Crown Copyright (c) 2013 Published by Elsevier Ltd. All rights reserved.
引用
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页码：62 / 68
页数：7
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