Electrochemical Behavior of Hydride Ion in a LiF-NaF-KF Eutectic Melt

  • QIAO Huan
    Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University
  • NOHIRA Toshiyuki
    Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University
  • ITO Yasuhiko
    Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University

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<p>The electrochemical behavior of hydride ion on a nickel electrode in a LiF-NaF-KF eutectic melt at 773 K has been studied by means of gas chromatography, cyclic voltammetry, chronopotentiometry and chronoamperometry. It was found that hydride ion is anodically oxidized at around 0.45 V vs. M+/M (M = alkali metal) and pure hydrogen gas is generated according to the following reaction:</p><p> H → l/2 H2 + e</p><p>This anodic process is a reversible, one-electron reaction governed by diffusion transport. The diffusion coefficient of hydride ion, <img align="middle" src="./Graphics/abst-67_643.png"/>, was estimated to be around 1 × 10−5 cm2 s−1 at 773 K.</p>

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  • Electrochemistry

    Electrochemistry 67 (6), 643-648, 1999-06-05

    公益社団法人 電気化学会

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