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

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Tree branch-shaped cupric oxide for highly effective photoelectrochemical water reduction

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Title
Tree branch-shaped cupric oxide for highly effective photoelectrochemical water reduction
Author
Jang, Youn JeongJang, Ji-WookChoi, Sun HeeKim, Jae YoungKim, Ju HunYoun, Duck HyunKim, Won YongHan, SuenghoonLee, Jae Sung
Issue Date
2015-05
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE , v.7, no.17, pp.7624 - 7631
Abstract
Highly efficient tree branch-shaped CuO photocathodes are fabricated using the hybrid microwave annealing process with a silicon susceptor within 10 minutes. The unique hierarchical, one-dimensional structure provides more facile charge transport, larger surface areas, and increased crystallinity and crystal ordering with less defects compared to irregular-shaped CuO prepared by conventional thermal annealing. As a result, the photocathode fabricated with the tree branch-shaped CuO produces an unprecedently high photocurrent density of -4.4 mA cm-2 at 0 VRHE under AM 1.5 G simulated sunlight compared to -1.44 mA cm-2 observed for a photocathode fabricated by thermal annealing. It is also confirmed that stoichiometric hydrogen and oxygen are produced from photoelectrochemical water splitting on the tree branch-shaped CuO photocathode and a platinum anode.
URI
https://scholarworks.unist.ac.kr/handle/201301/12775
URL
http://pubs.rsc.org/en/Content/ArticleLanding/2015/NR/c5nr00208g#!divAbstract
DOI
10.1039/c5nr00208g
ISSN
2040-3364
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