期刊
NANO LETTERS
卷 12, 期 9, 页码 5014-5019出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl302796f
关键词
Surface plasmons; gold nanorods; alumina; solar water splitting; H-2 production
类别
资金
- Institute for Energy Efficiency, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001009]
- MRSEC program of NSF National Science Foundation [DMR-1121053]
- National Science Foundation [DMR-0080034, DMR-0216466, DMR 0805148]
- Natural Sciences and Engineering Research Council of Canada
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0805148] Funding Source: National Science Foundation
We report a plasmonic water splitting cell in which 95% of the effective charge carriers derive from surface plasmon decay to hot electrons, as evidenced by fuel production efficiencies up to 20-fold higher at visible, as compared to UV, wavelengths. The cell functions by illuminating a dense array of aligned gold nanorods capped with TiO2, forming a Schottky metal/semiconductor interface which collects and conducts the hot electrons to an unilluminated platinum counter-electrode where hydrogen gas evolves. The resultant positive charges in the Au nanorods function as holes and are extracted by an oxidation catalyst which electrocatalytically oxidizes water to oxygen gas.
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