Gas diffusion electrodes

Gas diffusion electrodes are composed of a porous catalyst layer which has been applied on carrier material. The catalyst layer, which conducts electrons, catalyses an electrochemical reaction between the liquid and the gaseous phase. Thus, gas, electrolyte and the catalyst must be contacted. It is the so-called three-phase boundary on which three aggregate states (solid, liquid, gaseous) are contacted.

Three-phase boundary of a gas diffusion electrode

Three-phase boundary of a gas diffusion electrode

Overview of the catalysts und their range of application

There are appropriate catalysts for different electrochemical conversions.

What is a gas diffusion electrode?

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Gas diffusion electrode BiPlex®

The BiPlex gas diffusion electrode is characterized by its porous electrode structure. Typical fields of application are:

  • Water electrolysis
  • Chlorine alkali electrolysis
  • Zinc air batteries
  • Production of H2O2
  • Wastewater treatment
  • Double layer capacitor

The production process allows the use of different catalysts:

  • Platinum carbon
  • Manganese mixed oxide/carbon
  • Silver/silver carbon
  • Nickel/nickel carbon
  • Customer-specific catalysts

The catalyst layers are applied on woven metal nettings or carbon fleeces. They can be combined with porous PTFE-foil and/or microporous separators. Thus, we are able to develop and produce gas diffusion electrodes adjusted according to customer requests.

Fabrication of gas diffusion electrode BiPlex

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