アルカリ性溶液中におけるニッケルのアノード挙動

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タイトル別名
  • Anodic Behavior of Nickel in Alkaline Solution
  • アルカリセイ ヨウエキ チュウ ニ オケル ニッケル ノ アノード キョドウ

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Three kinds of oxides which are supposed to be NiO, Ni3O4 and Ni2O3, were found on the surface of nickel anode in alkaline solution by means of an electrochemical technique. It was estimated in 1 n KOH solution that the reversible potentials of transformation of NiO into Ni3O4 and of Ni3O4 into Ni2O3 were −0.35 V and +0.55 V, respectively. The potential of +0.55 V is fairly close to the value of +0.48 V reported by previous workers as the formation potential of Ni2O3. The potential of −0.35 V, however, is considerably different from +0.07 V reported by Glemser-Einerhand as the transition potential between NiO and Ni3O4. From the results of the experiment on the effect of dissolved oxygen in solution, it became clear that the potential of +0.07 V was not the equilibrium potential but the mixed potential of the dissolution reaction of nickel oxide and the reduction of oxygen. The free energies of the formation of Ni3O4 and Ni2O3 calculated from the equilibrium potentials were −189.7±∼1 and −124.2±∼1 kcal, respectively.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (12), 721-725, 1959

    公益社団法人 日本金属学会

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