Time- and Frequency-resolved Photoelectrochemical Investigations on Nano-honeycomb TiO2 Electrodes

  • YOSHIDA Tsukasa
    Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University
  • SHINADA Atsushi
    Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University
  • OEKERMANN Torsten
    Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University
  • SUGIURA Takashi
    Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University
  • SAKAI Tatsuya
    Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University
  • MINOURA Hideki
    Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University

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タイトル別名
  • Time- and Frequency-resolved Photoelectrochemical Investigations on Nano-honeycomb TiO<sub>2</sub> Electrodes

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<p>Time- and frequency-resolved photoelectrochemical studies have been performed on nano-honeycomb porous TiO2 electrode prepared by photoelectrochemical etching of single crystal TiO2, both for its bare surface and when sensitized by cis-di(thiocyanato)-N,N-bis(2,2’-bipyridyl-4,4’-dicalboxylate)ruthenium(II). Since the remaining wall in the porous layer become as thin as the double thickness of the space charge layer by photoetching, electron diffusion comes to play the main role in the charge transport rather than field-driven migration. Intensity modulated photocurrent spectroscopy revealed much faster electron diffusion in the honeycomb electrode than that in colloid based porous electrode, because of the smaller electron trap density in the nano-honeycomb structure owing to the nonexistence of grain boundaries.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 70 (6), 453-456, 2002-06-05

    公益社団法人 電気化学会

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