The pH effects on H2 evolution kinetics for visible light water splitting over the Ru/(CuAg)0.15In0.3Zn 1.4S2 photocatalyst

Guangshan Zhang; Wen Zhang; Daisuke Minakata; Yongsheng Chen; John Crittenden; Peng Wang

doi:10.1016/j.ijhydene.2013.06.140

The pH effects on H₂ evolution kinetics for visible light water splitting over the Ru/(CuAg)_0.15In_0.3Zn _1.4S₂ photocatalyst

Guangshan Zhang, Wen Zhang, Daisuke Minakata, Yongsheng Chen, John Crittenden, Peng Wang

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Much progress has been made in the development of novel visible light photocatalysts that split water into hydrogen (H₂) and oxygen (O ₂). In this study, we examine the impact of initial solution pH on H₂ production using an Ru/(CuAg)_0.15In _0.3Zn_1.4S₂ photocatalyst under visible light irradiation. In addition, the reaction mechanism was analyzed by examining the oxidation products of the electron donor (Iâ€) at different solution pH values. The results show that the initial pH significantly influenced the rate of H₂ production and quantum yield (QY). In particular, the photocatalyst yielded the highest apparent QY (∼12.8%) at 420 ± 5 nm and highest H₂ production rate (∼525 μmol h^-1) at pH 2; with increasing pH, the H₂ production and QY decreased significantly. The oxidation product of Iâ€ at pH < 6 was mainly I₃â€, whereas at pH > 6 water splitting did not occur at all, so no IO₃â€ or I₂ were observed.

Original language	English (US)
Pages (from-to)	11727-11736
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	38
Issue number	27
DOIs	https://doi.org/10.1016/j.ijhydene.2013.06.140
State	Published - Sep 10 2013

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

Keywords

H production
Ru/(CuAg)InZnS
Visible light irradiation
Water splitting
pH effect

Access to Document

10.1016/j.ijhydene.2013.06.140

Cite this

@article{2fd6f12797584ae1810d017c66ebf216,

title = "The pH effects on H2 evolution kinetics for visible light water splitting over the Ru/(CuAg)0.15In0.3Zn 1.4S2 photocatalyst",

abstract = "Much progress has been made in the development of novel visible light photocatalysts that split water into hydrogen (H2) and oxygen (O 2). In this study, we examine the impact of initial solution pH on H2 production using an Ru/(CuAg)0.15In 0.3Zn1.4S2 photocatalyst under visible light irradiation. In addition, the reaction mechanism was analyzed by examining the oxidation products of the electron donor (I{\^a}€) at different solution pH values. The results show that the initial pH significantly influenced the rate of H2 production and quantum yield (QY). In particular, the photocatalyst yielded the highest apparent QY (∼12.8%) at 420 ± 5 nm and highest H2 production rate (∼525 μmol h-1) at pH 2; with increasing pH, the H2 production and QY decreased significantly. The oxidation product of I{\^a}€ at pH < 6 was mainly I3{\^a}€, whereas at pH > 6 water splitting did not occur at all, so no IO3{\^a}€ or I2 were observed.",

keywords = "H production, Ru/(CuAg)InZnS, Visible light irradiation, Water splitting, pH effect",

author = "Guangshan Zhang and Wen Zhang and Daisuke Minakata and Yongsheng Chen and John Crittenden and Peng Wang",

note = "Funding Information: The authors appreciate support from the Brook Byers Institute for Sustainable Systems, Hightower Chair, and the Georgia Research Alliance at the Georgia Institute of Technology. This work was supported by Creative Research Groups of China (Grant No. 51121062 ). This study was partially supported by U.S. Environmental Protection Agency Science to Achieve Results Program Grant RD-83385601 and Semiconductor Research Corporation (SRC)/ESH grant (425.025). Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the supporting organizations. Guangshan Zhang would like to thank the China Scholarship Council for financial support. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

month = sep,

day = "10",

doi = "10.1016/j.ijhydene.2013.06.140",

language = "English (US)",

volume = "38",

pages = "11727--11736",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

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TY - JOUR

T1 - The pH effects on H2 evolution kinetics for visible light water splitting over the Ru/(CuAg)0.15In0.3Zn 1.4S2 photocatalyst

AU - Zhang, Guangshan

AU - Zhang, Wen

AU - Minakata, Daisuke

AU - Chen, Yongsheng

AU - Crittenden, John

AU - Wang, Peng

N1 - Funding Information: The authors appreciate support from the Brook Byers Institute for Sustainable Systems, Hightower Chair, and the Georgia Research Alliance at the Georgia Institute of Technology. This work was supported by Creative Research Groups of China (Grant No. 51121062 ). This study was partially supported by U.S. Environmental Protection Agency Science to Achieve Results Program Grant RD-83385601 and Semiconductor Research Corporation (SRC)/ESH grant (425.025). Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the supporting organizations. Guangshan Zhang would like to thank the China Scholarship Council for financial support. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013/9/10

Y1 - 2013/9/10

N2 - Much progress has been made in the development of novel visible light photocatalysts that split water into hydrogen (H2) and oxygen (O 2). In this study, we examine the impact of initial solution pH on H2 production using an Ru/(CuAg)0.15In 0.3Zn1.4S2 photocatalyst under visible light irradiation. In addition, the reaction mechanism was analyzed by examining the oxidation products of the electron donor (Iâ€) at different solution pH values. The results show that the initial pH significantly influenced the rate of H2 production and quantum yield (QY). In particular, the photocatalyst yielded the highest apparent QY (∼12.8%) at 420 ± 5 nm and highest H2 production rate (∼525 μmol h-1) at pH 2; with increasing pH, the H2 production and QY decreased significantly. The oxidation product of Iâ€ at pH < 6 was mainly I3â€, whereas at pH > 6 water splitting did not occur at all, so no IO3â€ or I2 were observed.

AB - Much progress has been made in the development of novel visible light photocatalysts that split water into hydrogen (H2) and oxygen (O 2). In this study, we examine the impact of initial solution pH on H2 production using an Ru/(CuAg)0.15In 0.3Zn1.4S2 photocatalyst under visible light irradiation. In addition, the reaction mechanism was analyzed by examining the oxidation products of the electron donor (Iâ€) at different solution pH values. The results show that the initial pH significantly influenced the rate of H2 production and quantum yield (QY). In particular, the photocatalyst yielded the highest apparent QY (∼12.8%) at 420 ± 5 nm and highest H2 production rate (∼525 μmol h-1) at pH 2; with increasing pH, the H2 production and QY decreased significantly. The oxidation product of Iâ€ at pH < 6 was mainly I3â€, whereas at pH > 6 water splitting did not occur at all, so no IO3â€ or I2 were observed.

KW - H production

KW - Ru/(CuAg)InZnS

KW - Visible light irradiation

KW - Water splitting

KW - pH effect

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