Hydrogen-evolving electrodes, membrane electrode assemblies and electrolyzers based thereon and methods of fabrication thereof

Abstract

Aspects of the invention provide novel cathodes to be employed with membranes that can operate in ionomer membrane-based electrolyzer cells between at least 50- and 95-degrees C. The cathodes comprise a carbon-based substrate, e.g., of woven cloth or paper, a hydrophobic binder-containing microporous layer, e.g., polytetrafluoroethylene (PTFE), and a catalyst layer comprising electrocatalysts and binders demonstrating ionic conductivity over a range of dry and wet operating conditions. According to some aspects of the invention, at least one layer of the microporous layer or catalyst layer has defined pore structure.

Dependencies are inferred from the claim text.