Kinetics of reduction of water to hydrogen by visible light on alumina supported Pt-CdS photocatalysts

被引：28

作者：

Sahu, Namita ^{[1
]}

Upadhyay, S. N. ^{[1
]}

Sinha, A. S. K. ^{[1
]}

机构：

[1] Banaras Hindu Univ, Inst Technol, Dept Chem Engn & Technol, Varanasi 221005, Uttar Pradesh, India

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 01期

关键词：

Hydrogen; Photocatalysis; Solar energy; Kinetics; CADMIUM-SULFIDE PHOTOCATALYSTS; PARTICLE ELECTRON-TRANSFER; SEMICONDUCTOR PHOTOCATALYSTS; SACRIFICIAL PHOTOLYSIS; H-2; PRODUCTION; DISPERSIONS; SUSPENSIONS; THIOSULFATE; SEPARATION; CATALYSTS;

D O I：

10.1016/j.ijhydene.2008.09.043

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 kinetics of hydrogen production from photolysis of water on alumina supported Pt-CdS catalyst using visible light has been studied. An induction period with negligible rate was observed upon illumination of catalyst. The rate gradually increases and again falls down. The rate has been observed to be proportional to the sulfide ions adsorbed on the surface of CdS. The induction period has been related to the re-establishment of adsorption equilibrium of sulfide ions on the catalyst surface under illumination. The decrease in rate is due to the deactivation of catalyst by hydrogen. A power law type rate expression for hydrogen production has been proposed which takes into account the deactivation of the catalyst. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：130 / 137

页数：8

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