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Electrochemical Characterization of Porous Silver Membranes during Oxygen Reduction in Alkaline Solution

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Keywords
  • Elektrochemische Energietechnik
Disciplines
  • Chemistry

Abstract

In order to analyze in detail the kinetics of the oxygen reduction reaction (ORR) and the influence of the porous electrode structure on the electrode performance in alkaline solution (10 M NaOH) at 80°C electrochemical impedance measurements (EIS) and cyclic voltammograms (CV) have been performed. The investigated electrodes were technical silver gas diffusion electrodes (GDE) and porous silver membranes with different pore radii ranging from 0.2 µm to 5 µm. Silver gas diffusion electrodes were used as cathodes for the oxygen reduction reaction in alkaline solution and as oxygen depolarized cathodes (ODC) in NaCl electrolysis.

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