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Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

Yamamoto, Masanori; Nishizawa, Yusuke; Chábera, Pavel LU ; Li, Fusheng; Pascher, Torbjörn LU ; Sundström, Villy LU ; Sun, Licheng and Imahori, Hiroshi (2016) In Chemical Communications 52(94). p.13702-13705
Abstract

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 (λ > 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... (More)

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 (λ > 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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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Communications
volume
52
issue
94
pages
4 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:84996805814
  • wos:000388958400015
ISSN
1359-7345
DOI
10.1039/c6cc07877j
language
English
LU publication?
yes
id
a84956f7-b794-42e0-89b5-6f113cb6e510
date added to LUP
2017-02-21 13:56:33
date last changed
2017-10-08 04:58:58
@article{a84956f7-b794-42e0-89b5-6f113cb6e510,
  abstract     = {<p>A new subporphyrin was synthesized for use as a molecular sensitizer in electrochemical and dye-sensitized photoelectrochemical water oxidation. A photoelectrochemical cell with a TiO<sub>2</sub> 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 (λ &gt; 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.</p>},
  author       = {Yamamoto, Masanori and Nishizawa, Yusuke and Chábera, Pavel and Li, Fusheng and Pascher, Torbjörn and Sundström, Villy and Sun, Licheng and Imahori, Hiroshi},
  issn         = {1359-7345},
  language     = {eng},
  number       = {94},
  pages        = {13702--13705},
  publisher    = {Royal Society of Chemistry},
  series       = {Chemical Communications},
  title        = {Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst},
  url          = {http://dx.doi.org/10.1039/c6cc07877j},
  volume       = {52},
  year         = {2016},
}