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Water is split into hydrogen and oxygen via the application of an electric current, using a porous anion exchange membrane diaphragm and an alkaline electrolyte.


Technology

What is it?

Water is split into hydrogen and oxygen via the application of an electric current, using a porous anion exchange membrane diaphragm and an alkaline electrolyte.

Why is it important?

More compact and safer than alkaline electrolysis and could make use of cheaper catalysts than in PEM electrolysis.

Characteristics

  • Inputs: Water, electricity
  • By-products: Oxygen
  • Operating temperature: <100°C

Benefits

  • Greater safety and efficiency compared to traditional alkaline electrolysis
  • Potential long system lifetime
  • Distilled water or a low concentration of alkaline solution can be used as electrolyte instead of concentrated KOH
  • Non-noble metal catalyst

Limitations

  • Potentially higher capital cost compared to alkaline electrolysis
  • Unproven technology (membrane)

RD&D priorities

  • Improve OH- conductivity in polymeric membrane
  • Improve durability of membrane – degradation remains an issue
  • Improve conductivity of electrolyte/membrane

Known active organisations

  • CSIRO
  • Deakin University
  • Monash University
  • Queensland University of Technology
  • The University of Adelaide

Other opportunities like this

  • Water is split into hydrogen and oxygen via the application of an electric current, using a porous diaphragm and an alkaline electrolyte.

  • A variation of an electrochemical system (AE, PEM, SOE) with a portion of the energy input being supplied by the chemical conversion of coal or other carbon sources such as biomass, alcohols or other hydrocarbons. Assisted electrolysis can be either high or low temperature.

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