Studies on the Molecular Mechanism of Electrochemical Oxygen Evolution Reaction by the Surface luminescence Spectroscopy

表面发光光谱研究电化学析氧反应的分子机理

基本信息

  • 批准号:
    61470008
  • 负责人:
  • 金额:
    $ 3.84万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
  • 财政年份:
    1986
  • 资助国家:
    日本
  • 起止时间:
    1986 至 1987
  • 项目状态:
    已结题

项目摘要

The majn purpose of this research is to elucidate the molecular mechanism of the photooxidation reaction of water at n-type metal oxide semiconductor electrodes such as n-TiO2 and n-SrTiO_3, mainly by using a method of our recently developed surface luminescence spectroscopy. Through such research, new active electrode materials for electrochemical oxidation reaction of water will be found. We have focused our attention mainly on the mechanism of the photooxidation reaction at the n-TiO, electrode. Though it has often been assumed so far that this reaction proceeds via adsorbed OH radicals produced by the oxidation of adsorbed OH ions by photogenerated holes, it has been concluded in this re- search that this reaction proceeds via interstitial OH radicals produced in the n-TiO_2 bulk close to the surface. Theoretical considerations have sup- ported the latter new mechanism, showing that (1) OH^- ions can be assumed to penetrate into the n-TiO_2 (rutile) bulk through channels present parallel to the c-axis of this crystal, and (2) the resulting interstitial OH- ions in the n-TiO_2 bulk are energetically more easily oxidized than the adsorbed OH- ions, and can be assumed to be oxidized by the photogenerated holes, contrary to the adsorbed OH- ions. The above new mechanism is of great interest, proposing quite a new concept for the understanding of the mechanism of electrode reactions. This mechanism is also very interesting from a practical view-point, in that it indicates the possibility of finding new active electrode materials through the re-investigation of electrode materials on the basis of this new concept. Furthermore, the present finging of this new mechanism is of great value in that it clearly indicates that the surface luminescence spectroscopy is very effective for the in situ investigation of the molecular mechanism of the electrode reactions.
本研究的主要目的是利用我们最近发展的表面发光光谱方法,阐明水在n型金属氧化物半导体电极如n-TiO_2和n-SrTiO_3上光氧化反应的分子机理。通过这些研究,将为水的电化学氧化反应寻找新的活性电极材料,我们主要研究了n-TiO_2电极上的光氧化反应机理。虽然迄今为止,人们通常认为该反应是通过光生空穴氧化吸附OH离子产生的吸附OH自由基进行的,但本研究得出结论,该反应是通过n-TiO_2本体靠近表面处产生的间隙OH自由基进行的。理论分析支持了后一种新的机理,表明(1)OH ~-离子可以通过平行于c轴的通道进入n-TiO_2(金红石)体相,(2)在n-TiO_2体相中产生的间隙OH ~-离子比吸附的OH ~-离子更容易被氧化,并且可以假设被光生空穴氧化,与吸附的OH-离子相反。上述新的机理是非常有趣的,为理解电极反应机理提出了一个相当新的概念。从实用的观点来看,这种机制也是非常有趣的,因为它表明了通过基于这种新概念重新研究电极材料来发现新的活性电极材料的可能性。此外,这一新机理的发现具有重要的价值,因为它清楚地表明,表面发光光谱是非常有效的原位研究的分子机制的电极反应。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Yoshihiro Nakato: "The Effect of Crystal Faces on the Photoluminescence of Single Crysta n-TiO_2 (Rutile) Electrodes" Under preparation.
Yoshihiro Nakato:“晶面对单晶n-TiO_2(金红石)电极光致发光的影响”正在准备中。
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    0
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Yoshiro Nakato: The Proceedings of a 1987 Symposium on ″Photoelectro-chemistry and Photosynthesis on Semiconducting Materials″, D. S. Ginley, et al. , Editors, The Electrochemical Society Proceedings Series.
Yoshiro Nakato:1987 年“半导体材料光电化学和光合作用”研讨会论文集,D. S. Ginley 等人,电化学学会论文集系列编辑。
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Yoshihiro Nakato: "Photoluminescence and Mechanism of Oxygen Photoevolution Reaction in Single Crystal n-TiO_2 Electrodes" The Proceedings of a 1987 Symposium on "Photoelectrochemistry and Photosynthesis on Semiconducting Materials", D.S.Ginley, et al. Ed
Yoshihiro Nakato:“单晶 n-TiO_2 电极中的光致发光和氧光演化反应的机制”1987 年“半导体材料上的光电化学和光合作用”研讨会论文集,D.S.Ginley 等人。
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    0
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Yoshihiro Nakato: The Journal of Physical Chemistry. 90. 6210-6216 (1986)
中藤义弘:《物理化学杂志》。
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    0
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Yoshihiro Nakato: "Luminescence Spectra from n-TiO_2 and n-SrTiO_3 Semiconductor Electrodes and Those Doped with Transition-Metal Oxides As Related with Intermediates of the Photooxidation Reaction of Water" The Journal of Physical Chemistry. 90. 6210-621
Yoshihiro Nakato:“n-TiO_2 和 n-SrTiO_3 半导体电极以及掺杂过渡金属氧化物的发光光谱与水光氧化反应中间体相关”《物理化学杂志》。
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NAKATO Yoshihiro其他文献

NAKATO Yoshihiro的其他文献

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{{ truncateString('NAKATO Yoshihiro', 18)}}的其他基金

Clarification of Mechanisms for Surface Photoreactions and Improvement of Photocatalytic Activity for Visible-light Responsive Metal Oxides
阐明表面光反应机理并提高可见光响应金属氧化物的光催化活性
  • 批准号:
    16350114
  • 财政年份:
    2004
  • 资助金额:
    $ 3.84万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Exploitation of spontaneous formation of nano-structures through nonlinear chemical dynamics
通过非线性化学动力学开发纳米结构的自发形成
  • 批准号:
    14350454
  • 财政年份:
    2002
  • 资助金额:
    $ 3.84万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of a New Method to Prepare Polycrystalline Silicon Thin Films for High-Efficiency and Low-Cost Solar Cells
开发一种制备高效低成本太阳能电池多晶硅薄膜的新方法
  • 批准号:
    09480102
  • 财政年份:
    1997
  • 资助金额:
    $ 3.84万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
New Method of Preparation of Polycrystalline Silicon Thin Films for High-Efficiency and Low-Cost Solar Cells
高效低成本太阳能电池多晶硅薄膜制备新方法
  • 批准号:
    07458106
  • 财政年份:
    1995
  • 资助金额:
    $ 3.84万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
High-Efficiency and Low-Cost Solar Cells of a New Type, Having Semiconductors Modified with Ultrafine Metal Particles
超细金属颗粒改性半导体的新型高效低成本太阳能电池
  • 批准号:
    05453191
  • 财政年份:
    1993
  • 资助金额:
    $ 3.84万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)

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