Photoelectrochemical Oxygen Evolution

Hoi Ying Chung; Hao Wu; Xuelian Wu; Chenliang Su; Yun Hau Ng

doi:10.1002/9783527830084.ch10

Photoelectrochemical Oxygen Evolution

Hoi Ying Chung, Hao Wu, Xuelian Wu, Chenliang Su, Yun Hau Ng

Chemical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

Harvesting sunlight energy and converting them into storable clean chemical fuels offer opportunities to solve global energy and environmental issues. Solar water splitting is an option to achieve this goal. However, water oxidation into oxygen (O₂) is a sluggish reaction compared with water reduction into hydrogen. Efficient photoelectrochemical O₂ evolution is needed to overcome this bottleneck half reaction. As the oxidation of water requires an electrochemical potential of 1.23V vs. NHE, the suitable photoactive materials should have a highly oxidative valence band position. Metal oxides are potential candidates for this photoelectrochemical O₂ evolving reaction because their deep valence band consists of mainly O₂p orbitals (or hybridized O₂p orbitals). This chapter discusses in detail the development of visible light active simple binary oxides, ternary oxides, and (oxy)nitrides for photoelectrochemical O₂ generation to provide an overview of the current status and the challenges encountered in this field.

Original language	English (US)
Title of host publication	Photo-and Electro-Catalytic Processes
Subtitle of host publication	Water Splitting, N 2 Fixing, CO 2 Reduction
Publisher	Wiley
Pages	301-337
Number of pages	37
ISBN (Electronic)	9783527830084
ISBN (Print)	9783527348596
DOIs	https://doi.org/10.1002/9783527830084.ch10
State	Published - Jan 1 2022

Bibliographical note

Publisher Copyright:
© 2022 WILEY-VCH GmbH, Boschstr. 12, 69469 Weinheim, Germany.

Keywords

bismuth vanadate
charge transfer
metal oxide semiconductors
photoanode
photoelectrochemical oxygen evolution
solar energy conversion

ASJC Scopus subject areas

General Engineering
General Materials Science

UN SDGs

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

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10.1002/9783527830084.ch10

Cite this

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title = "Photoelectrochemical Oxygen Evolution",

abstract = "Harvesting sunlight energy and converting them into storable clean chemical fuels offer opportunities to solve global energy and environmental issues. Solar water splitting is an option to achieve this goal. However, water oxidation into oxygen (O2) is a sluggish reaction compared with water reduction into hydrogen. Efficient photoelectrochemical O2 evolution is needed to overcome this bottleneck half reaction. As the oxidation of water requires an electrochemical potential of 1.23V vs. NHE, the suitable photoactive materials should have a highly oxidative valence band position. Metal oxides are potential candidates for this photoelectrochemical O2 evolving reaction because their deep valence band consists of mainly O2p orbitals (or hybridized O2p orbitals). This chapter discusses in detail the development of visible light active simple binary oxides, ternary oxides, and (oxy)nitrides for photoelectrochemical O2 generation to provide an overview of the current status and the challenges encountered in this field.",

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doi = "10.1002/9783527830084.ch10",

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AU - Chung, Hoi Ying

AU - Wu, Hao

AU - Wu, Xuelian

AU - Su, Chenliang

AU - Ng, Yun Hau

PY - 2022/1/1

Y1 - 2022/1/1

N2 - Harvesting sunlight energy and converting them into storable clean chemical fuels offer opportunities to solve global energy and environmental issues. Solar water splitting is an option to achieve this goal. However, water oxidation into oxygen (O2) is a sluggish reaction compared with water reduction into hydrogen. Efficient photoelectrochemical O2 evolution is needed to overcome this bottleneck half reaction. As the oxidation of water requires an electrochemical potential of 1.23V vs. NHE, the suitable photoactive materials should have a highly oxidative valence band position. Metal oxides are potential candidates for this photoelectrochemical O2 evolving reaction because their deep valence band consists of mainly O2p orbitals (or hybridized O2p orbitals). This chapter discusses in detail the development of visible light active simple binary oxides, ternary oxides, and (oxy)nitrides for photoelectrochemical O2 generation to provide an overview of the current status and the challenges encountered in this field.

AB - Harvesting sunlight energy and converting them into storable clean chemical fuels offer opportunities to solve global energy and environmental issues. Solar water splitting is an option to achieve this goal. However, water oxidation into oxygen (O2) is a sluggish reaction compared with water reduction into hydrogen. Efficient photoelectrochemical O2 evolution is needed to overcome this bottleneck half reaction. As the oxidation of water requires an electrochemical potential of 1.23V vs. NHE, the suitable photoactive materials should have a highly oxidative valence band position. Metal oxides are potential candidates for this photoelectrochemical O2 evolving reaction because their deep valence band consists of mainly O2p orbitals (or hybridized O2p orbitals). This chapter discusses in detail the development of visible light active simple binary oxides, ternary oxides, and (oxy)nitrides for photoelectrochemical O2 generation to provide an overview of the current status and the challenges encountered in this field.

KW - bismuth vanadate

KW - charge transfer

KW - metal oxide semiconductors

KW - photoanode

KW - photoelectrochemical oxygen evolution

KW - solar energy conversion

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M3 - Chapter

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EP - 337

BT - Photo-and Electro-Catalytic Processes

PB - Wiley

ER -

Photoelectrochemical Oxygen Evolution

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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