Formation of Nickel Hydroxide Thin Layer on the Surface of Nickel Electrode

• Kodama Ayumi

  Ochanomizu University

• Ikeda Hiroko

  Fukushima Medical University

• Nakase Chiho

  Ochanomizu University

• Masuda Takako

  Tokyo Medical University

• Kitahara Keiichi

  Tokyo Medical University

• Arai Sadao

  Tokyo Medical University

• Onuma Yoshio

  Onuma Giken Co., Ltd.

• Hayashi Koji

  Institute of Industrial Science, University of Tokyo

• Yamashita Junzo

  Ochanomizu University

• Aikawa Yoshihiro

  Ochanomizu University

Bibliographic Information

Other Title

• Ni電極表面におけるNi水酸化物膜の生成
• Ni デンキョク ヒョウメン ニ オケル Ni スイサンカブツ マク ノ セイセイ

Abstract

Transient of current in thin layer formation on nickel electrode was investigated during an anodic potential step in 0.1 M NaOH aqueous solution. The current was shown to have a time-dependency of i(t)=i₀[1+(t/τ)]^-1/2 which was derived from ionic migration under potential drop through the surface thin film. In the equation, the initial current, i₀, and the time constant, τ, after the potential step were estimated from the slope and the intercept on the 1/i² vs. t plot, respectively. From a plot of i₀²τ vs. φ, the oxide layer thickness at the potential, φ₀, before the step and an average ionic mobility in the oxide film were calculated. The oxide layer was found to grow from the potential of 0.02 V vs. SCE and to saturate in thickness at 1.3 nm at the potential range between 0.2 and 0.4 V. The average mobility was estimated to be μ=9.9×10^-20m²V^-1s^-1.

Journal

• Zairyo-to-Kankyo

  Zairyo-to-Kankyo 55 (12), 544-548, 2006

  Japan Society of Corrosion Engineering

Keywords

• nickel electrode
• surface oxide layer
• oxide layer thickness
• mobility
• Ni(OH)₂

Details

• CRID: 1390282681237012352
• NII Article ID: 10018458384
• NII Book ID: AN10235427
• DOI: 10.3323/jcorr.55.544
• ISSN: 18819664
• ISSN: 09170480
• NDL BIB ID: 8610186
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8610186
• Web Site: https://www.jstage.jst.go.jp/article/jcorr/55/12/55_12_544/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed