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Journal of Applied Electrochemistry

, Volume 12, Issue 1, pp 121–126 | Cite as

Potentiodynamic response of the Ni(OH)2/NiOOH redox couple at the inner layer of the complex interface

  • R. E. Carbonio
  • V. A. Macagno
  • M. C. Giordano
  • J. R. Vilche
  • A. J. Arvía
Papers

Abstract

The electrochemical response of the Pt/Ni(OH)2 interface subjected to potentiodynamic sweeps shows the contribution of the Ni (OH)2/Ni(OOH) redox couple immediately attached to the Pt(O) surface, when the substrate surface to Ni(OH)2 layer volume ratio is varied. A comparison with previously published results shows that the response of the innermost portion of the Ni(OH)2/NiOOH layer depends on the characteristic of the substrate, the temperature, the electrolyte concentration, the degree of hydration of the Ni(OH)2 film and the hydrophobicity of the substrate. The results indicate that the water content of the inner film is probably lower than that of the bulk, the Ni(III) species probably approaching the O-octahedral co-ordination corresponding toγ1-NiOOH.

Keywords

Physical Chemistry Hydration Volume Ratio Substrate Surface Electrolyte Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd. 1982

Authors and Affiliations

  • R. E. Carbonio
    • 1
  • V. A. Macagno
    • 1
  • M. C. Giordano
    • 1
  • J. R. Vilche
    • 2
  • A. J. Arvía
    • 2
  1. 1.Departamento de Fisicoquímica, Facultad de Ciencias QuímicasUniversidad National de CórdobaCórdobaArgentina
  2. 2.División Electroquímica. Sucursal 4Institute de Investigaciones Fisicoquímicas Teóricas y Aplicadas, (INIFTA)La PlataArgentina

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