ナノハニカム TiO_2電極の時間及び周波数分解光電気化学測定法による評価 Time- and Frequency-resolved Photoelectrochemical Investigations on Nano-honeycomb TiO_2 Electrodes

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Abstract

<p>Time- and frequency-resolved photoelectrochemical studies have been performed on nano-honeycomb porous TiO<sub>2</sub> electrode prepared by photoelectrochemical etching of single crystal TiO<sub>2</sub>, 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>

Journal

  • Electrochemistry

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

    The Electrochemical Society of Japan

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Codes

  • NII Article ID (NAID)
    10008573597
  • NII NACSIS-CAT ID (NCID)
    AN00151637
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    13443542
  • NDL Article ID
    6180112
  • NDL Source Classification
    ZP1(科学技術--化学・化学工業)
  • NDL Call No.
    Z17-14
  • Data Source
    CJP  NDL  J-STAGE 
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