Z-schematic water splitting into H2 and O2 using metal sulfide as a hydrogen-evolving photocatalyst and reduced graphene oxide as a solid-state electron mediator

Katsuya Iwashina; Akihide Iwase; Yun Hau Ng; Rose Amal; Akihiko Kudo

doi:10.1021/ja511615s

Z-schematic water splitting into H₂ and O₂ using metal sulfide as a hydrogen-evolving photocatalyst and reduced graphene oxide as a solid-state electron mediator

Katsuya Iwashina, Akihide Iwase, Yun Hau Ng, Rose Amal, Akihiko Kudo^*

^*Corresponding author for this work

Chemical Engineering

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

469 Scopus citations

Abstract

Z-schematic water splitting was successfully demonstrated using metal sulfide photocatalysts that were usually unsuitable for water splitting as single particulate photocatalysts due to photocorrosion. When metal sulfide photocatalysts with a p-type semiconductor character as a H₂-evolving photocatalyst were combined with reduced graphene oxide-TiO₂ composite as an O₂-evolving photocatalyst, water splitting into H₂ and O₂ in a stoichiometric amount proceeded. In this system, photogenerated electrons in the TiO₂ with an n-type semiconductor character transferred to the metal sulfide through a reduced graphene oxide to achieve water splitting. Moreover, this system was active for solar water splitting.

Original language	English (US)
Pages (from-to)	604-607
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	137
Issue number	2
DOIs	https://doi.org/10.1021/ja511615s
State	Published - Jan 21 2015

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja511615s

Cite this

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title = "Z-schematic water splitting into H2 and O2 using metal sulfide as a hydrogen-evolving photocatalyst and reduced graphene oxide as a solid-state electron mediator",

abstract = "Z-schematic water splitting was successfully demonstrated using metal sulfide photocatalysts that were usually unsuitable for water splitting as single particulate photocatalysts due to photocorrosion. When metal sulfide photocatalysts with a p-type semiconductor character as a H2-evolving photocatalyst were combined with reduced graphene oxide-TiO2 composite as an O2-evolving photocatalyst, water splitting into H2 and O2 in a stoichiometric amount proceeded. In this system, photogenerated electrons in the TiO2 with an n-type semiconductor character transferred to the metal sulfide through a reduced graphene oxide to achieve water splitting. Moreover, this system was active for solar water splitting.",

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Z-schematic water splitting into H₂ and O₂ using metal sulfide as a hydrogen-evolving photocatalyst and reduced graphene oxide as a solid-state electron mediator. / Iwashina, Katsuya; Iwase, Akihide; Ng, Yun Hau et al.
In: Journal of the American Chemical Society, Vol. 137, No. 2, 21.01.2015, p. 604-607.

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

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