Proton exchange membrane water electrolysis with short-side-chain Aquivion membrane and IrO2 anode catalyst |
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Authors: | Anita Skulimowska,Marc Dupont,Marta Zaton,Svein Sunde,Luca Merlo,Deborah J. Jones,Jacques Roziè re |
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Affiliation: | 1. Institut Charles Gerhardt, UMR 5253, Aggregates, Interfaces and Materials for Energy, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France;2. Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;3. Solvay Speciality Polymers Italy S.p.A., Viale Lombardia 20, 20021 Bollate, Milan, Italy |
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Abstract: | A series of three membrane types has been screened for medium temperature solid polymer electrolyte water electrolysis in membrane electrode assemblies coated with 2 mg cm−2 of iridium oxide as a catalyst for the oxygen evolution reaction, synthesised via a hydrolysis method from the hexachloroiridic acid precursor, and deposited on the membrane either directly by spray deposition or by decal transfer. The short-side-chain perfluorosulfonic acid Aquivion® ionomer of equivalent weight 870 meq g−1, in membranes of thickness 120 μm, gives higher water electrolysis performance at 120 °C than a composite membrane of Aquivion® with zirconium phosphate, while a sulfonated ether-linked polybenzimidazole, sulfonated poly-[(1-(4,4′-diphenylether)-5-oxybenzimidazole)-benzimidazole], shows promising performance and no transport limitations up to 2 A cm−2. The lowest cell voltage was observed at 120 °C for an MEA prepared using spray-coating directly on the Aquivion® membrane, 1.57 V at 1 A cm−2. |
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Keywords: | PEM water electrolysis Short-side-chain perfluorosulfonic acid ionomer Aquivion® Sulfonated polybenzimidazole Iridium oxide Oxygen evolution reaction |
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