Dye sensitized hydrogen evolution from water

被引:138
作者
Dhanalakshmi, KB [1 ]
Latha, S [1 ]
Anandan, S [1 ]
Maruthamuthu, P [1 ]
机构
[1] Univ Madras, Dept Energy Chem Interdisciplinary, Chennai 600025, India
关键词
D O I
10.1016/S0360-3199(00)00134-8
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
Photochemically stable catalysts for continuous production of dihydrogen from water in the presence of visible light are yet to be developed. Most of the proposed systems suffer from loss of activity with use, at varying extent. In the present investigation, the photoactivity of Pt/TiO2 system in the visible region is improved by the addition of the sensitizer ([Ru(dcbpy)(2)(dpq)](2+)) [where dcbpy = 4,4 ' -dicarboxy 2,2 ' -bipyridine and dpq = 2,3-bis-(2 ' -pyridyl)-quinoxalinel leading to efficient water reduction. This system is relatively inexpensive, reproducible, extremely stable and efficient in conversion of light into dihydrogen in aqueous solution. In order to obtain maximum information about the performance of TiO2-Pt catalysts, we varied the components and conditions of the system for water reduction. The dependence of the dihydrogen evolution rate on the amount of catalysts, concentration of the sensitizer and percentage of platinum on TiO2 has been studied. In addition to the above, a comparative study on the photocatalytic activities of Pt/TiO2 and Pt/ZnO in the presence of the above sensitizer for the production of hydrogen was also made. (C) 2001 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:669 / 674
页数:6
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