Issue 2, 2015

Durable hydrogen evolution from water driven by sunlight using (Ag,Cu)GaSe2 photocathodes modified with CdS and CuGa3Se5

Abstract

The photoelectrochemical properties of (Ag,Cu)GaSe2 (ACGSe) modified by deposition of CdS and CuGa3Se5 layers were investigated. The CdS and CuGa3Se5 layers formed p–n junctions with an appropriate band diagram on the surface of the electrode and they clearly increased the cathodic photocurrent and onset potential. The Pt, CdS, and CuGa3Se5 modified ACGSe (Pt/CdS/CuGa3Se5/ACGSe) with an appropriate thickness of CuGa3Se5 layers (ca. 100 nm) showed a cathodic photocurrent of 8.79 mA cm−2 at 0 VRHE and an onset potential of 0.62 VRHE (defined as cathodic photocurrent of 1.0 mA cm−2) under simulated sunlight irradiation in 0.1 M Na2HPO4 (pH 10). Pt/CdS/CuGa3Se5/ACGSe showed durable cathodic current under the observed reaction conditions and hydrogen was evolved for about 20 days.

Graphical abstract: Durable hydrogen evolution from water driven by sunlight using (Ag,Cu)GaSe2 photocathodes modified with CdS and CuGa3Se5

Supplementary files

Article information

Article type
Edge Article
Submitted
04 aug 2014
Accepted
03 sep 2014
First published
04 sep 2014
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2015,6, 894-901

Author version available

Durable hydrogen evolution from water driven by sunlight using (Ag,Cu)GaSe2 photocathodes modified with CdS and CuGa3Se5

L. Zhang, T. Minegishi, M. Nakabayashi, Y. Suzuki, K. Seki, N. Shibata, J. Kubota and K. Domen, Chem. Sci., 2015, 6, 894 DOI: 10.1039/C4SC02346C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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