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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
; ; ; ; ; ; and
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
  • pmid:27819083
  • 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
2024-04-14 05:17:01
@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}},
  doi          = {{10.1039/c6cc07877j}},
  volume       = {{52}},
  year         = {{2016}},
}