In Situ XAFS Study of Oxides Formed on Nickel Thin Film Electrodes in KOH Solution.

Abstract

The composition and structure of the oxides formed on nickel are of great interest for a number of technological applications, e.g., batteries and corrosion. In spite of the considerable research that has been done, there is still much uncertainty as to the stoichiometry and structure of the various oxides (hydroxides) that are formed during the anodic oxidation of the nickel. This is due largely to the highly disordered or amorphous nature of the phases formed which makes structural determination by X-ray diffraction difficult. X-ray absorption Fine Structure (XAFS) spectroscopy is an excellent technique for the characterization of such materials which have no long range order. In this paper, we present initial results of an "in situ" study of the structure and composition of the oxides (hydroxides) formed on Ni thin film electrodes in 5M KOH solution as a function of the applied potential.

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Document Details

Document Type
Technical Report
Publication Date
Dec 05, 1994
Accession Number
ADA288735

Entities

People

  • Azzam N. Mansour
  • C. A. Melendres

Organizations

  • Naval Surface Warfare Center

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Amplitude
  • Chemistry
  • Diffraction
  • Electrodes
  • Films
  • Materials
  • Materials Science
  • Military Research
  • New Hampshire
  • Oxides
  • Spectra
  • Surface Warfare
  • Thin Films
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science
  • Physics

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.