Abstract
The need to develop polymer electrolyte water electrolyzers with minimum amounts of precious materials, in particular those from the platinum metal group, but conserving high performance needs development and optimization of many materials and components.The interface between the catalyst- and porous transport layers (PTL) is in this respect particularly important as it seems to have a strong influence on the current density distribution, the IrO2 catalyst utilization and it’s mass activity. All of these parameters should be optimized.The presentation reviews the effects of PTL structures on the decisive limitations, explains improvements and tries to make a look into the future.
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