A method for preparing a polymer electrolyte membrane comprising: (a) preparing an ink solution comprising a precious metal catalyst on a supporting particle and an ion exchange material; (b) providing a polymeric support having a microstructure of micropo...

A solid polymer electrolyte membrane (10) comprises (a) an ion exchange material (12) and (b) dispersed in said ion exchange material, a hydrogen peroxide decomposition catalyst (14) comprising (i) an organic polymer comprising a monomer with at least two ...