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 journalArticle

29 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 languageEnglish
Pages (from-to)13702-13705
Number of pages4
JournalChemical Communications
Volume52
Issue number94
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

ASJC Scopus subject areas

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

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  • Cite this

    Yamamoto, M., Nishizawa, Y., Chábera, P., Li, F., Pascher, T., Sundström, V., Sun, L., & Imahori, H. (2016). Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst. Chemical Communications, 52(94), 13702-13705. https://doi.org/10.1039/c6cc07877j