Pantò, F and Siracusano, S. and Briguglio, N. and Aricò, A.S. (2020) Durability of a recombination catalyst-based membrane-electrode assembly for electrolysis operation at high current density. Applied Energy, 279. ISSN 1872-9118
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Abstract
Hydrogen production through polymer electrolyte membrane water electrolysis was investigated at high current density (4 A cm-2). A PtCo recombination catalyst-based membrane-electrode assembly (MEA) was assessed in terms of performance, efficiency and durability. The electrolysis cell consisted of a thin (50 µm) perfluorosulfonic acid membrane and low platinum group metals (PGM) catalyst loadings (0.6 mgMEA PGM cm-2). An unsupported PtCo catalyst was successfully integrated in the anode. A composite catalytic layer made of IrRuOx and PtCo assisted both oxygen evolution and oxidation of hydrogen permeated through the membrane. The cell voltage for the recombination catalyst-based MEA was about 30 mV lower than the bare MEA during a 3500 h durability test. The modified MEA showed low performance losses during 3500 hours operation at high current density (4 A cm-2) with low catalyst loadings. A decay rate of 9 µV/h was observed in the last 1000 hours. These results are promising for decreasing the capital costs of polymer electrolyte membrane electrolysers. Moreover, the stable voltage efficiency of about 80% vs. the high heating value (HHV) of hydrogen at 4 A cm-2, here achieved, appears very promising to decrease operating expenditures.
| Item Type: | Article |
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| Uncontrolled Keywords: | PtCo recombination catalystPolymer electrolyte membrane ElectrolysisHydrogenLow catalyst loadingsHigh current density operationSteady-state durability tests |
| Subjects: | 500 Scienze naturali e Matematica > 540 Chimica e scienze connesse 600 Tecnologia - Scienze applicate > 660 Ingegneria chimica |
| Depositing User: | Siracusano Stefania |
| Date Deposited: | 12 Oct 2020 11:14 |
| Last Modified: | 12 Oct 2020 11:14 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/20265 |
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