The Redox Behavior of Electroless Ni/PTFE Deposits in KOH

Ten Chin Wen, Chi Chang Hu, Yat June Li

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

The Ni(II) and higher valence states redox behavior of Ni and Ni/PTFE deposited electrodes fabricated by electroless plating are compared using cyclic voltammetry and potentiodynamic techniques, for their ability to evolve O2 and oxidize ethanol in 1 mol dm-3KOH. In this study, a Ni/PTFE electrode formed in a 6 g dm-3 polytetrafluoroethylene (PTFE) containing plating bath demonstrates the highest activity. An examination of the surface morphology of this Ni/PTFE deposit demonstrates that the highest activity of this electrode is not caused by the enhanced surface area of the Ni/PTFE electrode. The presence of PTFE in a Ni electrode alters the formation pathway of ϒ-phase Ni hydrous oxide. Gamma-phase Ni hydrous oxide catalyzes O2 evolution, while an intermediate species/structure between p-NiOOH and ϒ-NiO2 is responsible for the oxidation of ethanol.

Original languageEnglish
Pages (from-to)2554-2558
Number of pages5
JournalJournal of the Electrochemical Society
Volume140
Issue number9
DOIs
Publication statusPublished - 1993 Sep

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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