Water electrolysis will have a crucial role in the coming years, as efficient hydrogen production is essential for advancing the integration of green hydrogen into the energy transition landscape. Proton exchange membrane water electrolyzers (PEMWE) are one of the most promising technologies, though they raise certain environmental concerns. The most diffused polymer in this technology is Nafion, a perfluorosulfonic acid (PFSA) polymer that finds use in the form of membrane and binder for catalysts. PFSAs carry some environmental issues, their production and disposal can be linked to the release in the atmosphere of very harmful fluorinated gases. Due to this, European Union plans to limit their production and use in the near future.