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Solar Water Splitting in a Molecular Photoelectrochemical Cell

United States Patent Application

20150072852
A1
View the Complete Application at the US Patent & Trademark Office
A Dye Sensitized Photoelectrosynthesis Cell (DSPEC) splits water with visible light using a derivatized, core/shell nanostructured photoanode with the core having a high surface area conductive metal oxide film--such as nanoITO (indium tin oxide) or nanoATO (antimony tin oxide)--coated with a thin outer shell of, for example, TiO.sub.2 formed by Atomic Layer Deposition (ALD). A "chromophore-catalyst assembly" 1, [(PO.sub.3H.sub.2).sub.2bpy).sub.2Ru(4-Mebpy-4-bimpy)Ru(tpy)(OH.sub.2)].s- up.4+, which combines both light absorber and water oxidation catalyst in a single molecule, is attached to the TiO.sub.2 shell. Visible photolysis of the resulting core/shell/assembly structure with a Pt cathode results in water splitting into hydrogen and oxygen.
Alibabaei, Leila (Carrboro, NC), Brennaman, Matthew Kyle (Durham, NC), Norris, Michael (Seattle, WA), Parsons, Gregory N. (Raleigh, NC), Meyer, Thomas J. (Chapel Hill, NC)
THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL (Chapel Hill NC), NORTH CAROLINA STATE UNIVERSITY (Raleigh NC)
14/ 479,995
September 8, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under Grant Nos. DE-SC0001011 and DE-FG26-08NT01925 awarded by the Department of Energy. The U.S. government has certain rights in the invention.