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タイトル
  • en The effect of anodizing temperature on the oxygen evolution reaction activity of anodized FeNiCo alloy in alkaline electrolyte
作成者
アクセス権 open access
権利情報
  • en © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
  • http://creativecommons.org/licenses/by-nc-nd/4.0/
  • en Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
主題
  • Other en Anodizing
  • Other en Oxygen evolution reaction
  • Other en Oxyhydroxide
  • Other en FeNiCo
  • Other en Electrocatalyst
内容注記
  • Abstract en This study investigates the oxygen evolution reaction (OER) activity of the FeNiCo alloy anodized at several temperatures in a fluoride-containing ethylene glycol electrolyte. When the alloy is anodized at 10 V, the OER activity in KOH electrolyte is highly enhanced on the alloy anodized at 15 and 20 degrees C, at which non-uniform film growth proceeds. The fraction of the locally thick film regions increases with anodizing time, enhancing the OER activity. Only thin porous films are formed at >= 30 degrees C even though the anodizing current is high because of the promotion of film dissolution at high electrolyte temperatures. Because of the thickness limitation, the OER activity is relatively low when the anodic films are formed at >= 30 degrees C. A good correlation is found between the OER activity and the electric double-layer capacitance; thicker porous anodic films enhance the OER activity. The anodic film formed at each temperature consists of a rutile-type (FeNiCo)F-2 phase, but in KOH electrolyte, it is converted readily to an oxyhydroxide phase, which is OER active. A similar to 2 mu m-thick film obtained under the optimum anodizing condition reduces the overpotential of OER to 245 mV at 10 mA cm(-2) in 1.0 mol dm(-3) KOH electrolyte.
出版者 en Elsevier
日付
    Issued2022-09-20
言語
  • eng
資源タイプ journal article
出版タイプ AM
資源識別子 HDL http://hdl.handle.net/2115/92804
関連
  • isVersionOf DOI https://doi.org/10.1016/j.electacta.2022.140875
収録誌情報
    • PISSN 0013-4686
      • en Electrochimica acta
      • 巻427 開始ページ140875
ファイル
コンテンツ更新日時 2024-07-20