Triple layered Ga2O3/Cu2O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts

Hee Jun Kim; Tae Won Lee; Hye Hyun Kim; U. Jeong Yang; Chan Ul Kim; Kyoung Jin Choi; Heon Lee; Jeong Min Baik

doi:10.1039/d0ta00179a

Triple layered Ga₂O₃/Cu₂O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts

Hee Jun Kim, Tae Won Lee, Hye Hyun Kim, U. Jeong Yang, Chan Ul Kim, Kyoung Jin Choi, Heon Lee, Jeong Min Baik

Department of Materials Science and Engineering

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

1 Citation (Scopus)

Abstract

In this study, the photoelectrochemical performance of Cu₂O-based photoanodes is evaluated in terms of photoactivity and stability. The electrodes are based on the p-n junction consisting of Cu₂O/Ga₂O₃on which an Au layer is deposited, followed by the formation of Ni-based co-catalysts. The Au layer increases the light absorption in the entire wavelength range from 300 to 800 nm and leads to upward band bending at the Cu₂O/Au interface; thus, more photogenerated hole charges are transported to the electrolytes. The electrodeposited FeNiO_xthin layer significantly decreases the overpotential and increases the photoactivity; thus, the photoelectrochemical cell consisting of the Cu₂O-based photoanode and platinum yields a photocurrent density of about 5.15 mA cm⁻²at 1.23 Vvs.RHE with a small dark current density of 16 μA cm⁻²

Original language	English
Pages (from-to)	10966-10972
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	8
Issue number	21
DOIs	https://doi.org/10.1039/d0ta00179a
Publication status	Published - 2020 Jun 7

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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This output contributes to the following Sustainable Development Goal(s)

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10.1039/d0ta00179a

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Triple layered Ga₂O₃/Cu₂O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts. / Kim, Hee Jun; Lee, Tae Won; Kim, Hye Hyun; Yang, U. Jeong; Kim, Chan Ul; Choi, Kyoung Jin; Lee, Heon; Baik, Jeong Min.

In: Journal of Materials Chemistry A, Vol. 8, No. 21, 07.06.2020, p. 10966-10972.

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

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title = "Triple layered Ga2O3/Cu2O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts",

abstract = "In this study, the photoelectrochemical performance of Cu2O-based photoanodes is evaluated in terms of photoactivity and stability. The electrodes are based on the p-n junction consisting of Cu2O/Ga2O3on which an Au layer is deposited, followed by the formation of Ni-based co-catalysts. The Au layer increases the light absorption in the entire wavelength range from 300 to 800 nm and leads to upward band bending at the Cu2O/Au interface; thus, more photogenerated hole charges are transported to the electrolytes. The electrodeposited FeNiOxthin layer significantly decreases the overpotential and increases the photoactivity; thus, the photoelectrochemical cell consisting of the Cu2O-based photoanode and platinum yields a photocurrent density of about 5.15 mA cm−2at 1.23 Vvs.RHE with a small dark current density of 16 μA cm−2",

author = "Kim, {Hee Jun} and Lee, {Tae Won} and Kim, {Hye Hyun} and Yang, {U. Jeong} and Kim, {Chan Ul} and Choi, {Kyoung Jin} and Heon Lee and Baik, {Jeong Min}",

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AU - Kim, Hee Jun

AU - Lee, Tae Won

AU - Kim, Hye Hyun

AU - Yang, U. Jeong

AU - Kim, Chan Ul

AU - Choi, Kyoung Jin

AU - Lee, Heon

AU - Baik, Jeong Min

PY - 2020/6/7

Y1 - 2020/6/7

N2 - In this study, the photoelectrochemical performance of Cu2O-based photoanodes is evaluated in terms of photoactivity and stability. The electrodes are based on the p-n junction consisting of Cu2O/Ga2O3on which an Au layer is deposited, followed by the formation of Ni-based co-catalysts. The Au layer increases the light absorption in the entire wavelength range from 300 to 800 nm and leads to upward band bending at the Cu2O/Au interface; thus, more photogenerated hole charges are transported to the electrolytes. The electrodeposited FeNiOxthin layer significantly decreases the overpotential and increases the photoactivity; thus, the photoelectrochemical cell consisting of the Cu2O-based photoanode and platinum yields a photocurrent density of about 5.15 mA cm−2at 1.23 Vvs.RHE with a small dark current density of 16 μA cm−2

AB - In this study, the photoelectrochemical performance of Cu2O-based photoanodes is evaluated in terms of photoactivity and stability. The electrodes are based on the p-n junction consisting of Cu2O/Ga2O3on which an Au layer is deposited, followed by the formation of Ni-based co-catalysts. The Au layer increases the light absorption in the entire wavelength range from 300 to 800 nm and leads to upward band bending at the Cu2O/Au interface; thus, more photogenerated hole charges are transported to the electrolytes. The electrodeposited FeNiOxthin layer significantly decreases the overpotential and increases the photoactivity; thus, the photoelectrochemical cell consisting of the Cu2O-based photoanode and platinum yields a photocurrent density of about 5.15 mA cm−2at 1.23 Vvs.RHE with a small dark current density of 16 μA cm−2

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