Can Europe Make Green Hydrogen Without the World's Rarest Metal?

EU's SUPREME project targets PFAS-free PEM electrolysis and a 75% cut in iridium use to make green hydrogen viable at scale

8 Apr 2026

European scientists may have cracked one of the biggest obstacles standing between green hydrogen and the mainstream energy market. A new EU-funded project called SUPREME, launched in February 2026 and led by the University of Southern Denmark, is attacking the two problems that have long held PEM electrolysis back: its reliance on PFAS, the "forever chemicals" the EU is moving to ban, and its dependence on iridium, one of the rarest and most expensive metals on Earth.

Proton exchange membrane electrolysis is the leading method for splitting water into hydrogen using renewable electricity. It handles the variable power flows of wind and solar better than most alternatives. But its environmental and cost profile has limited how fast it can scale. Current systems embed PFAS deep into membrane components, a regulatory liability growing by the year. Meanwhile, iridium costs keep green hydrogen well above fossil-derived alternatives on price.

The SUPREME consortium pulls together six institutions across Europe, each with a distinct technical role. Graz University of Technology is benchmarking PFAS-free membrane materials against industry standards, testing whether sustainable alternatives can hold up under continuous industrial use. The Turkish Science and Technology Council is engineering new microporous membranes with no fluorinated chemicals at all.

At the University of Southern Denmark, researchers working alongside British catalyst firm Ceimig are developing techniques to cut iridium loading by up to 75 percent, while recovering around 90% of the remaining metal through closed-loop recycling. Fraunhofer ISE in Germany is manufacturing next-generation membrane electrode assemblies, and Element One Energy in Norway is designing a rotating electrolyser aimed at reducing energy consumption per kilogram of hydrogen produced.

The project runs three years under the EU's Clean Energy Transition Partnership. Europe's 40-gigawatt electrolyser target for 2030 depends on exactly the kind of cost and compliance breakthrough SUPREME is chasing. If the consortium delivers, it could reshape the economics of clean hydrogen and accelerate decarbonization across heavy industry, aviation, and grid-scale energy storage.

Europe's green hydrogen future may be closer than it looks.