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

Masanori Yamamoto; Yusuke Nishizawa; Pavel Chábera; Fusheng Li; Torbjörn Pascher; Villy Sundström; Licheng Sun; Hiroshi Imahori

doi:10.1039/c6cc07877j

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

Masanori Yamamoto, Yusuke Nishizawa, Pavel Chábera, Fusheng Li, Torbjörn Pascher, Villy Sundström, Licheng Sun, Hiroshi Imahori

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

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 supported the photocatalytic activity.

Original language	English
Pages (from-to)	13702-13705
Number of pages	4
Journal	Chemical Communications
Volume	52
Issue number	94
DOIs	https://doi.org/10.1039/c6cc07877j
Publication status	Published - 2016
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

Access to Document

10.1039/c6cc07877j

Cite this

@article{c27fca244b24406ea42e6969708e7de3,

title = "Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst",

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 supported the photocatalytic activity.",

author = "Masanori Yamamoto and Yusuke Nishizawa and Pavel Ch{\'a}bera and Fusheng Li and Torbj{\"o}rn Pascher and Villy Sundstr{\"o}m and Licheng Sun and Hiroshi Imahori",

note = "Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

year = "2016",

doi = "10.1039/c6cc07877j",

language = "English",

volume = "52",

pages = "13702--13705",

journal = "Chemical Communications",

issn = "1359-7345",

publisher = "Royal Society of Chemistry",

number = "94",

}

TY - JOUR

T1 - Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

AU - Yamamoto, Masanori

AU - Nishizawa, Yusuke

AU - Chábera, Pavel

AU - Li, Fusheng

AU - Pascher, Torbjörn

AU - Sundström, Villy

AU - Sun, Licheng

AU - Imahori, Hiroshi

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84996805814&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84996805814&partnerID=8YFLogxK

U2 - 10.1039/c6cc07877j

DO - 10.1039/c6cc07877j

M3 - Article

AN - SCOPUS:84996805814

SN - 1359-7345

VL - 52

SP - 13702

EP - 13705

JO - Chemical Communications

JF - Chemical Communications

IS - 94

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this