Journal
CHEMICAL COMMUNICATIONS
Volume 52, Issue 94, Pages 13702-13705Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cc07877j
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Funding
- Swedish Energy Agency
- Swedish Research Council
- JSPS
- [14J03432]
- [25220801]
- Grants-in-Aid for Scientific Research [14J03432] Funding Source: KAKEN
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A new subporphyrin was synthesized for use as a molecular sensitizer in electrochemical and dye-sensitized photoelectrochemical water oxidation. A photoelectrochemical cell with a TiO2 electrode modified with the sensitizer and a molecular water oxidation catalyst generated higher photocurrent than reference cells that have electrodes modified with either the photosensitizer or the catalyst under visible light (lambda > 500 nm) illumination. Oxygen evolution was confirmed after photolysis by GC and GC-MS analyses using isotope-labeling experiments. The large molar extinction coefficients of the ring-contracted porphyrin in the visible region enabled kinetic analysis by time-resolved transient absorption spectroscopy, which also supported the photocatalytic activity.
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