THE KINETICS OF THE OXYGEN-PEROXIDE COUPLE ON CARBON

Abstract

The reduction of O2 to HO2(-) and the reverse process were studied in alkaline solutions on pyrolytic carbon as well as porous carbon and graphite in which the pores were filled with paraffin in order to restrict the electrochemical reactions to the outermost surface. The rotating disc technique was used with the pyrolytic carbon bon. With both types of carbon the cathodic polarization was found to be a linear-reaction of log i/(iL -i) where i sub L is the diffusion limiting current density. The anodic measure ments on the paraffin-filled electrodes indicate a kinetically controlled limiting current density which is directly proportional to the HO2(-) concentration and independent of hydroxyl concentration for 0.1 to 4.0 M KOH. The kinetic significance of the results are discussed relative to possible mechanisms. The cathodic data support the hypothesis that the rate-determining step is an one- electron process leading to the formation of a peroxide radical intermediate O2(-) or O2H which is probably adsorbed on the electrode surface.

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1963
Accession Number
AD0409121

Entities

People

  • Ernest B. Yeager
  • K. V. Rao
  • Philip Krouse

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Counter WMD
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Anodic Polarization
  • Cells
  • Chemistry
  • Current Density
  • Electrochemical Cells
  • Electrochemical Reactions
  • Electrodes
  • Electronic Equipment
  • Energy
  • Equations
  • High Pressure
  • Measurement
  • Military Research
  • Navy
  • New York
  • Organic Materials
  • Surface Properties

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies

Technology Areas

  • Microelectronics