Electrochemistry of Ruthenium Purple Confined in a Polymer Matrix : Voltammetry, Electrocatalysis for Hydrogen Evolution, and Electron-Transport Characteristics

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著者

    • ABE Toshiyuki
    • Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
    • KAWAI Noriaki
    • Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
    • TAJIRI Akio
    • Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University

抄録

The synthesis of iron(III) ruthenocyanide (Ruthenium Purple, RP) in a Nafion (Nf) membrane was carried out. The visible-light absorption spectrum of the resulting RP exhibited an inter-valent charge-transfer band around 550–570 nm similar to that of neat RP, evidently showing that RP is formed in a polymer matrix. The voltammetric characteristics of the RP confined in the Nf matrix (Nf[RP]) were investigated compared with the neat RP. When Nf[RP] was used as an electrocatalyst to reduce H<sup>+</sup>, efficient H<sub>2</sub> formation was found to originate from its molecular catalysis. In order to investigate the dominant factor that affects the overall kinetics in H<sup>+</sup> reduction catalysis, the dependencies of both the catalytic activity (represented by the turnover number (TN) of a RP unit) and the diffusion coefficient of electron (<i>D</i><sub>app</sub>) were studied as a function of the RP concentration in the matrix. The <i>D</i><sub>app</sub> value decreased with increasing the concentration. The dependence of TN on the concentration was similar to that of <i>D</i><sub>app</sub>, indicating that the overall kinetics is dominated by electron transport by RP.

収録刊行物

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 76(3), 645-650, 2003-03-15

    The Chemical Society of Japan

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各種コード

  • NII論文ID(NAID)
    10012811488
  • NII書誌ID(NCID)
    AA00580132
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00092673
  • データ提供元
    CJP書誌  J-STAGE 
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