Dynamics of Electron Recombination and Transport in Water-Splitting

May 21, 2015 - Rutile TiO2 as an Anode Material for Water-Splitting Dye-Sensitized Photoelectrochemical Cells. John R. Swierk , Kevin P. Regan , Jianb...
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Article pubs.acs.org/JPCC

Dynamics of Electron Recombination and Transport in WaterSplitting Dye-Sensitized Photoanodes John R. Swierk, Nicholas S. McCool, and Thomas E. Mallouk* Departments of Chemistry, Physics, and Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States S Supporting Information *

ABSTRACT: Water-splitting dye-sensitized photoelectrochemical cells (WS-DSPECs) use visible light to split water using molecular sensitizers and water oxidation catalysts codeposited onto mesoporous TiO2 electrodes. Despite a high quantum yield of charge injection and low requirement for the catalytic turnover rate, the quantum yield of water splitting in WS-DSPECs is typically low (