Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 110, Issue 50, Pages 20008-20013Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1319628110
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Funding
- University of North Carolina Energy Frontier Research Center (UNC EFRC): Center for Solar Fuels, an Energy Frontier Research Center
- US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences [DE-SC0001011]
- Research Triangle Solar Fuels Institute
- US DOE, Office of Energy Efficiency and Renewable Energy [08NT0001925]
- Center for Catalytic Hydrocarbon Functionalization, an EFRC
- US DOE, Office of Science, Office of Basic Energy Sciences at the University of Virginia [DE-SC0001298]
- U.S. Department of Energy (DOE) [DE-SC0001298] Funding Source: U.S. Department of Energy (DOE)
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Artificial photosynthesis and the production of solar fuels could be a key element in a future renewable energy economy providing a solution to the energy storage problem in solar energy conversion. We describe a hybrid strategy for solar water splitting based on a dye sensitized photoelectrosynthesis cell. It uses a derivatized, core-shell nanostructured photoanode with the core a high surface area conductive metal oxide film--indium tin oxide or antimony tin oxide-coated with a thin outer shell of TiO2 formed by atomic layer deposition. A chromophore-catalyst assembly 1, [(PO3H2)(2)bpy)(2)Ru(4-Mebpy-4-bimpy)Rub(tpy)(OH2)](4+), which combines both light absorber and water oxidation catalyst in a single molecule, was attached to the TiO2 shell. Visible photolysis of the resulting core-shell assembly structure with a Pt cathode resulted in water splitting into hydrogen and oxygen with an absorbed photon conversion efficiency of 4.4% at peak photocurrent.
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