Durability of a recombination catalyst-based membrane-electrode assembly for electrolysis operation at high current density

Fabiola Pantò, Stefania Siracusano, Nicola Briguglio and Antonino Salvatore Aricò

Applied Energy, 2020, vol. 279, issue C, No S0306261920312897

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 h 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 h. 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.

Keywords: PtCo recombination catalyst; Polymer electrolyte membrane electrolysis; Hydrogen; Low catalyst loadings; High current density operation; Steady-state durability tests (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (2)

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DOI: 10.1016/j.apenergy.2020.115809

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