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Jang, Ji-Wook
JW Energy Lab
Research Interests
  • Materials Science, Energy

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

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Title
Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system
Author
Jang, Youn JeongJang, Ji-WookLee, JaehyukKim, Ju HunKumagai, HiromuLee, JinwooMinegishi, TsutomuKubota, JunDomen, KazunariLee, Jae Sung
Issue Date
2015-12
Publisher
ROYAL SOC CHEMISTRY
Citation
ENERGY & ENVIRONMENTAL SCIENCE, v.8, no.12, pp.3597 - 3604
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/17946
URL
http://pubs.rsc.org/en/Content/ArticleLanding/2015/EE/C5EE01445J#!divAbstract
DOI
10.1039/c5ee01445j
ISSN
1754-5692
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