PEM steam electrolysis at 130 °C using a phosphoric acid doped short side chain PFSA membrane

Martin Kalmar Hansen, David Aili, Erik Christensen, Chao Pan, Søren Eriksen, Jens Oluf Jensen, Jens H. Von Barner, Qingfeng Li, Niels Bjerrum

Research output: Contribution to journalJournal articleResearchpeer-review


Steam electrolysis test with a phosphoric acid doped Aquivion™ membrane was successfully conducted and current densities up to 775 mA cm-2 at 1.8 V was reached at 130 ºC and ambient pressure. A new composite membrane system using a perfluorosulfonic acid membrane (Aquivion™) as matrix and phosphoric acid as proton conducting electrolyte was developed. Traditional perfluorosulfonic acid membranes do not possess sufficient dimensional stability and proton conductivity to be used at elevated temperatures and ambient pressures. The elevated temperature, high potentials and acidic conditions implied that a new and highly corrosion resistant construction material was needed. Tantalum coated stainless steel felt was tested and found suitable as the anode gas diffusion layer.
Copyright © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Issue number15
Pages (from-to)10992-11000
Publication statusPublished - 2012


  • Water electrolysis
  • High temperature
  • Tantalum coating
  • Proton exchange membrane


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