text: In comparison to Proton exchange membrane electrolysis, the advantages of alkaline water electrolysis are mainly: 
  # Cheaper catalysts with respect to the platinum metal group based catalysts used for PEM water electrolysis. 
  # Higher durability due to an exchangeable electrolyte and lower dissolution of anodic catalyst. 
  # Higher gas purity due to lower gas diffusivity in alkaline electrolytes.