Solar hydrogen evolution using a CuGaS2 photocathode improved by incorporating reduced graphene oxide

A. Iwase; Y. H. Ng; R. Amal; A. Kudo

doi:10.1039/c5ta01237f

Solar hydrogen evolution using a CuGaS₂ photocathode improved by incorporating reduced graphene oxide

A. Iwase^*, Y. H. Ng, R. Amal, A. Kudo

^*Corresponding author for this work

Chemical Engineering

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

46 Scopus citations

Abstract

The effectiveness of reduced graphene oxide (RGO) in water reduction on a CuGaS₂ photocathode was demonstrated. Graphene oxide was photocatalytically reduced over CuGaS₂ particles under visible light irradiation to give an RGO-CuGaS₂ composite. The incorporated RGO dramatically enhanced the cathodic photocurrent of the CuGaS₂ photoelectrode under visible light irradiation. Detection of evolved H₂ indicated that the enhanced cathodic photocurrent was used for water reduction to H₂. Upon combining the developed RGO-CuGaS₂ composite photocathode with a BiVO₄ photoanode loaded with a CoO_x cocatalyst, photocurrent and the corresponding H₂ evolution were successfully observed without applying an external bias between both photoelectrodes under simulated sunlight irradiation.

Original language	English (US)
Pages (from-to)	8566-8570
Number of pages	5
Journal	JOURNAL OF MATERIALS CHEMISTRY A
Volume	3
Issue number	16
DOIs	https://doi.org/10.1039/c5ta01237f
State	Published - Apr 28 2015

Bibliographical note

Publisher Copyright:
© 2015 The Royal Society of Chemistry.

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c5ta01237f

Cite this

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title = "Solar hydrogen evolution using a CuGaS2 photocathode improved by incorporating reduced graphene oxide",

abstract = "The effectiveness of reduced graphene oxide (RGO) in water reduction on a CuGaS2 photocathode was demonstrated. Graphene oxide was photocatalytically reduced over CuGaS2 particles under visible light irradiation to give an RGO-CuGaS2 composite. The incorporated RGO dramatically enhanced the cathodic photocurrent of the CuGaS2 photoelectrode under visible light irradiation. Detection of evolved H2 indicated that the enhanced cathodic photocurrent was used for water reduction to H2. Upon combining the developed RGO-CuGaS2 composite photocathode with a BiVO4 photoanode loaded with a CoOx cocatalyst, photocurrent and the corresponding H2 evolution were successfully observed without applying an external bias between both photoelectrodes under simulated sunlight irradiation.",

author = "A. Iwase and Ng, {Y. H.} and R. Amal and A. Kudo",

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AU - Iwase, A.

AU - Ng, Y. H.

AU - Amal, R.

AU - Kudo, A.

PY - 2015/4/28

Y1 - 2015/4/28

N2 - The effectiveness of reduced graphene oxide (RGO) in water reduction on a CuGaS2 photocathode was demonstrated. Graphene oxide was photocatalytically reduced over CuGaS2 particles under visible light irradiation to give an RGO-CuGaS2 composite. The incorporated RGO dramatically enhanced the cathodic photocurrent of the CuGaS2 photoelectrode under visible light irradiation. Detection of evolved H2 indicated that the enhanced cathodic photocurrent was used for water reduction to H2. Upon combining the developed RGO-CuGaS2 composite photocathode with a BiVO4 photoanode loaded with a CoOx cocatalyst, photocurrent and the corresponding H2 evolution were successfully observed without applying an external bias between both photoelectrodes under simulated sunlight irradiation.

AB - The effectiveness of reduced graphene oxide (RGO) in water reduction on a CuGaS2 photocathode was demonstrated. Graphene oxide was photocatalytically reduced over CuGaS2 particles under visible light irradiation to give an RGO-CuGaS2 composite. The incorporated RGO dramatically enhanced the cathodic photocurrent of the CuGaS2 photoelectrode under visible light irradiation. Detection of evolved H2 indicated that the enhanced cathodic photocurrent was used for water reduction to H2. Upon combining the developed RGO-CuGaS2 composite photocathode with a BiVO4 photoanode loaded with a CoOx cocatalyst, photocurrent and the corresponding H2 evolution were successfully observed without applying an external bias between both photoelectrodes under simulated sunlight irradiation.

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