Photoelectrochemical Behavior of Photosystem I Complex in the Presence of a Viologen as Mediator at SnO₂ Electrode

• KATO Yuki

  Institute of Industrial Science, The University of Tokyo

• TSUJII Masahiro

  Institute of Industrial Science, The University of Tokyo

• WATANABE Tadashi

  Institute of Industrial Science, The University of Tokyo

Bibliographic Information

Other Title

• Photoelectrochemical Behavior of Photosystem I Complex in the Presence of a Viologen as Mediator at SnO2 Electrode

Abstract

Photo-excitation of photosystem (PS) I complexes at an SnO₂/electrolyte interface yielded an anodic photocurrent in the presence of methyl or benzyl viologen. In sharp contrast to ordinary spectral sensitization of semiconductor electrodes, the photocurrent appeared at potentials far negative of the flatband potential of SnO₂, the photocurrent formed a bell-shaped curve against the potential, and the peak potential shifted in a Nernstian manner as a function of the viologen concentration. These results suggest an isoenergetic electron transfer from the reduced form of mediator (viologen) bound just beneath the PS I complex surface.

Journal

• Electrochemistry

  Electrochemistry 79 (10), 845-847, 2011

  The Electrochemical Society of Japan

Keywords

• Photosynthesis
• Photosystem Complex
• Viologen-Mediated Photocurrent

Details

• CRID: 1390282681472629888
• NII Article ID: 130002150488
• DOI: 10.5796/electrochemistry.79.845
• COI: 1:CAS:528:DC%2BC3MXhtleit7%2FF
• ISSN: 21862451
• ISSN: 13443542
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/79/10/79_10_845/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed