Utilization of Perovskite-Type Oxynitride La0.5Sr0.5Ta0.5Ti0.5O2N as an O2-Evolving Photocatalyst in Z-Scheme Water Splitting

Hiromu Kumagai; Ryosuke Aoyagi; Kosaku Kato; Akira Yamakata; Masato Kakihana; Hideki Kato

doi:10.1021/acsaem.0c03055

Utilization of Perovskite-Type Oxynitride La_0.5Sr_0.5Ta_0.5Ti_0.5O₂N as an O₂-Evolving Photocatalyst in Z-Scheme Water Splitting

Hiromu Kumagai, Ryosuke Aoyagi, Kosaku Kato, Akira Yamakata, Masato Kakihana, Hideki Kato

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

11 Citations (Scopus)

Abstract

The particulate Z-scheme water splitting system involving a perovskite-type oxynitride as an O2-evolving photocatalyst has been first demonstrated using La0.5Sr0.5Ta0.5Ti0.5O2N accompanied by Ru-loaded SrTiO3:Rh and [Co(bpy)3]3+/2+ (bpy = 2,2′-bipyridine) as a H2-evolving photocatalyst and an electron mediator, respectively. O2 evolution was negligible when the bare oxynitride was employed. A Pt cocatalyst deposited on La0.5Sr0.5Ta0.5Ti0.5O2N promoted the reduction of [Co(bpy)3]3+ due to capturing electrons, resulting in an enhancement of O2 evolution. It has also been discovered that the [Co(bpy)3]3+/2+ electron mediator suppresses water formation over Pt particles.

Original language	English
Pages (from-to)	2056-2060
Number of pages	5
Journal	ACS Applied Energy Materials
Volume	4
Issue number	3
DOIs	https://doi.org/10.1021/acsaem.0c03055
Publication status	Published - Mar 22 2021
Externally published	Yes

Keywords

perovskite-type oxynitride
photocatalyst
visible light response
water splitting
Z-scheme system

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Electrical and Electronic Engineering
Materials Chemistry

UN SDGs

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

Access to Document

10.1021/acsaem.0c03055

Cite this

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title = "Utilization of Perovskite-Type Oxynitride La0.5Sr0.5Ta0.5Ti0.5O2N as an O2-Evolving Photocatalyst in Z-Scheme Water Splitting",

abstract = "The particulate Z-scheme water splitting system involving a perovskite-type oxynitride as an O2-evolving photocatalyst has been first demonstrated using La0.5Sr0.5Ta0.5Ti0.5O2N accompanied by Ru-loaded SrTiO3:Rh and [Co(bpy)3]3+/2+ (bpy = 2,2′-bipyridine) as a H2-evolving photocatalyst and an electron mediator, respectively. O2 evolution was negligible when the bare oxynitride was employed. A Pt cocatalyst deposited on La0.5Sr0.5Ta0.5Ti0.5O2N promoted the reduction of [Co(bpy)3]3+ due to capturing electrons, resulting in an enhancement of O2 evolution. It has also been discovered that the [Co(bpy)3]3+/2+ electron mediator suppresses water formation over Pt particles.",

keywords = "perovskite-type oxynitride, photocatalyst, visible light response, water splitting, Z-scheme system",

author = "Hiromu Kumagai and Ryosuke Aoyagi and Kosaku Kato and Akira Yamakata and Masato Kakihana and Hideki Kato",

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AU - Kumagai, Hiromu

AU - Aoyagi, Ryosuke

AU - Kato, Kosaku

AU - Yamakata, Akira

AU - Kakihana, Masato

AU - Kato, Hideki

N1 - Publisher Copyright: ©

PY - 2021/3/22

Y1 - 2021/3/22

N2 - The particulate Z-scheme water splitting system involving a perovskite-type oxynitride as an O2-evolving photocatalyst has been first demonstrated using La0.5Sr0.5Ta0.5Ti0.5O2N accompanied by Ru-loaded SrTiO3:Rh and [Co(bpy)3]3+/2+ (bpy = 2,2′-bipyridine) as a H2-evolving photocatalyst and an electron mediator, respectively. O2 evolution was negligible when the bare oxynitride was employed. A Pt cocatalyst deposited on La0.5Sr0.5Ta0.5Ti0.5O2N promoted the reduction of [Co(bpy)3]3+ due to capturing electrons, resulting in an enhancement of O2 evolution. It has also been discovered that the [Co(bpy)3]3+/2+ electron mediator suppresses water formation over Pt particles.

AB - The particulate Z-scheme water splitting system involving a perovskite-type oxynitride as an O2-evolving photocatalyst has been first demonstrated using La0.5Sr0.5Ta0.5Ti0.5O2N accompanied by Ru-loaded SrTiO3:Rh and [Co(bpy)3]3+/2+ (bpy = 2,2′-bipyridine) as a H2-evolving photocatalyst and an electron mediator, respectively. O2 evolution was negligible when the bare oxynitride was employed. A Pt cocatalyst deposited on La0.5Sr0.5Ta0.5Ti0.5O2N promoted the reduction of [Co(bpy)3]3+ due to capturing electrons, resulting in an enhancement of O2 evolution. It has also been discovered that the [Co(bpy)3]3+/2+ electron mediator suppresses water formation over Pt particles.

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