Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 26, Pages 13731-13737Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta02901e
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Funding
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics (MANA), MEXT, Japan
- National Basic Research Program of China (973 Program) [2014CB239301]
- China Scholarship Council (CSC)
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A highly enhanced activity for photoelectrochemical water splitting was achieved by fabricating carbon nanotube (CNT) and Co3O4 decorated hierarchical ZnO nanowire (NW) arrays via a facile stepwise synthesis strategy. The ternary CNT-ZnO-Co3O4 NW composite exhibits an increased photocurrent density (1.9 mA cm(-2) at 0.6 V vs. Ag/AgCl, 2.7 times larger than that of the pristine ZnO NWs) and improved incident photon to current conversion efficiency (52.5% at 340 nm, 5.1 times higher than that of the pristine ZnO NWs) as a photoanode under AM 1.5G simulated sunlight. This enhancement is attributed to the specific heterogeneous ternary architecture, which results in promoted electron-hole charge separation and transfer, decreased water oxidation overpotential as well as increased reaction rates of water splitting by decorating ZnO NWs with CNTs and Co3O4.
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