Tree branch-shaped cupric oxide for highly effective photoelectrochemical water reduction
- Authors
- Jang, Youn Jeong; Jang, Ji-Wook; Choi, Sun Hee; Kim, Jae Young; Kim, Ju Hun; Youn, Duck Hyun; Kim, Won Yong; Han, Suenghoon; Lee, Jae Sung
- Issue Date
- Mar-2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.7, no.17, pp.7624 - 7631
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 7
- Number
- 17
- Start Page
- 7624
- End Page
- 7631
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/157683
- DOI
- 10.1039/C5NR00208G
- ISSN
- 2040-3364
- 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.
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