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Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst
KTH, School of Chemical Science and Engineering (CHE), Chemistry.ORCID iD: 0000-0003-3455-0855
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2016 (English)In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 52, no 94, 13702-13705 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2016. Vol. 52, no 94, 13702-13705 p.
Keyword [en]
Electron-Transfer Mediator, Photoelectrochemical Cells, Core/Shell Photoanode, Oxide Surfaces, Metal-Oxides, Solar-Cells, Single-Site, Efficiency, Complexes, Dynamics
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-198913DOI: 10.1039/c6cc07877jISI: 000388958400015PubMedID: 27819083Scopus ID: 2-s2.0-84996805814OAI: oai:DiVA.org:kth-198913DiVA: diva2:1063020
Funder
Swedish Energy AgencySwedish Research Council
Note

QC 20170109

Available from: 2017-01-09 Created: 2016-12-22 Last updated: 2017-01-09Bibliographically approved

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