Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system

Youn Jeong Jang; Ji Wook Jang; Jaehyuk Lee; Ju Hun Kim; Hiromu Kumagai; Jinwoo Lee; Tsutomu Minegishi; Jun Kubota; Kazunari Domen; Jae Sung Lee

doi:10.1039/c5ee01445j

Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO₂ reduction system

Youn Jeong Jang, Ji Wook Jang, Jaehyuk Lee, Ju Hun Kim, Hiromu Kumagai, Jinwoo Lee, Tsutomu Minegishi, Jun Kubota, Kazunari Domen, Jae Sung Lee

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

130 Citations (Scopus)

Abstract

A gold-coupled ZnTe/ZnO-nanowire array is a new photocathode for selective CO₂ reduction to CO. At -0.7 V_RHE under simulated 1 sun illumination, its photocurrent (-16.0 mA cm^-2) and incident photon-to-current conversion efficiency (97%) represent the highest among reported ZnTe photocathodes for CO₂ reduction and dramatic enhancement from those of a bare electrode (-7.9 mA cm^-2, 68%). In addition, the Au nanoparticles convert mainly-hydrogen-producing bare ZnTe/ZnO-nanowires into mainly-CO-producing photocathodes in photoelectrochemical CO₂ reduction. The remarkable effects of the Au co-catalyst originate from the formation of a Schottky junction with ZnTe to improve charge separation and to provide reaction centers for CO₂ reduction suppressing competing water reduction.

Original language	English
Pages (from-to)	3597-3604
Number of pages	8
Journal	Energy and Environmental Science
Volume	8
Issue number	12
DOIs	https://doi.org/10.1039/c5ee01445j
Publication status	Published - 2015 Dec
Externally published	Yes

ASJC Scopus subject areas

Environmental Chemistry
Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Pollution

UN SDGs

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

Access to Document

10.1039/c5ee01445j

Cite this

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title = "Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system",

abstract = "A gold-coupled ZnTe/ZnO-nanowire array is a new photocathode for selective CO2 reduction to CO. At -0.7 VRHE under simulated 1 sun illumination, its photocurrent (-16.0 mA cm-2) and incident photon-to-current conversion efficiency (97%) represent the highest among reported ZnTe photocathodes for CO2 reduction and dramatic enhancement from those of a bare electrode (-7.9 mA cm-2, 68%). In addition, the Au nanoparticles convert mainly-hydrogen-producing bare ZnTe/ZnO-nanowires into mainly-CO-producing photocathodes in photoelectrochemical CO2 reduction. The remarkable effects of the Au co-catalyst originate from the formation of a Schottky junction with ZnTe to improve charge separation and to provide reaction centers for CO2 reduction suppressing competing water reduction.",

author = "Jang, {Youn Jeong} and Jang, {Ji Wook} and Jaehyuk Lee and Kim, {Ju Hun} and Hiromu Kumagai and Jinwoo Lee and Tsutomu Minegishi and Jun Kubota and Kazunari Domen and Lee, {Jae Sung}",

year = "2015",

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doi = "10.1039/c5ee01445j",

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publisher = "Royal Society of Chemistry",

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T1 - Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system

AU - Jang, Youn Jeong

AU - Jang, Ji Wook

AU - Lee, Jaehyuk

AU - Kim, Ju Hun

AU - Kumagai, Hiromu

AU - Lee, Jinwoo

AU - Minegishi, Tsutomu

AU - Kubota, Jun

AU - Domen, Kazunari

AU - Lee, Jae Sung

PY - 2015/12

Y1 - 2015/12

N2 - A gold-coupled ZnTe/ZnO-nanowire array is a new photocathode for selective CO2 reduction to CO. At -0.7 VRHE under simulated 1 sun illumination, its photocurrent (-16.0 mA cm-2) and incident photon-to-current conversion efficiency (97%) represent the highest among reported ZnTe photocathodes for CO2 reduction and dramatic enhancement from those of a bare electrode (-7.9 mA cm-2, 68%). In addition, the Au nanoparticles convert mainly-hydrogen-producing bare ZnTe/ZnO-nanowires into mainly-CO-producing photocathodes in photoelectrochemical CO2 reduction. The remarkable effects of the Au co-catalyst originate from the formation of a Schottky junction with ZnTe to improve charge separation and to provide reaction centers for CO2 reduction suppressing competing water reduction.

AB - A gold-coupled ZnTe/ZnO-nanowire array is a new photocathode for selective CO2 reduction to CO. At -0.7 VRHE under simulated 1 sun illumination, its photocurrent (-16.0 mA cm-2) and incident photon-to-current conversion efficiency (97%) represent the highest among reported ZnTe photocathodes for CO2 reduction and dramatic enhancement from those of a bare electrode (-7.9 mA cm-2, 68%). In addition, the Au nanoparticles convert mainly-hydrogen-producing bare ZnTe/ZnO-nanowires into mainly-CO-producing photocathodes in photoelectrochemical CO2 reduction. The remarkable effects of the Au co-catalyst originate from the formation of a Schottky junction with ZnTe to improve charge separation and to provide reaction centers for CO2 reduction suppressing competing water reduction.

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