The pH effects on H2 evolution kinetics for visible light water splitting over the Ru/(CuAg)0.15In0.3Zn1.4S2 photocatalyst

被引：34

作者：

Zhang, Guangshan ^{[1
,2
]}

Zhang, Wen ^{[3
]}

Minakata, Daisuke ^{[5
]}

Chen, Yongsheng ^{[2
]}

Crittenden, John ^{[2
,4
]}

Wang, Peng ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Municipal & Environm Engn, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

[2] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA

[3] New Jersey Inst Technol, Dept Civil & Environm Engn, Newark, NJ 07102 USA

[4] Georgia Inst Technol, Brook Byers Inst Sustainable Syst, Atlanta, GA 30332 USA

[5] Michigan Technol Univ, Dept Civil & Environm Engn, Houghton, MI 49931 USA

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 27期

关键词：

Ru/(CuAg)(0.15)In0.3Zn1.4S2; H-2; production; pH effect; Visible light irradiation; Water splitting; SOLID-SOLUTION PHOTOCATALYSTS; HYDROGEN-PRODUCTION; TIO2; NANOPARTICLES; AQUEOUS-SOLUTION; REDOX MEDIATOR; IODINE; NANOSTRUCTURES; GENERATION; SULFIDE; SIZE;

D O I：

10.1016/j.ijhydene.2013.06.140

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：

Much progress has been made in the development of novel visible light photocatalysts that split water into hydrogen (H-2) and oxygen (O-2). In this study, we examine the impact of initial solution pH on H-2 production using an Ru/(CuAg)(0.15)In0.3Zn1.4S2 photocatalyst under visible light irradiation. In addition, the reaction mechanism was analyzed by examining the oxidation products of the electron donor (I-) at different solution pH values. The results show that the initial pH significantly influenced the rate of H-2 production and quantum yield (QY). In particular, the photocatalyst yielded the highest apparent QY (similar to 12.8%) at 420 +/- 5 nm and highest H-2 production rate (similar to 525 mu mol h(-1)) at pH 2; with increasing pH, the H-2 production and QY decreased significantly. The oxidation product of I- at pH <6 was mainly I-3(-), whereas at pH >6 water splitting did not occur at all, so no IO3- or I-2 were observed. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：11727 / 11736

页数：10

共 52 条

[1] Development of new photocatalytic water splitting into H2 and O2 using two different semiconductor photocatalysts and a shuttle redox mediator IO3 -/I- [J].