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Investigation of NiFe-Based Catalysts for Oxygen Evolution in Anion-Exchange Membrane Electrolysis

Author

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  • Sabrina Campagna Zignani

    (Institute for Advanced Energy Technologies “Nicola Giordano” (ITAE) of the Italian National Research Council (CNR), 98126 Messina, Italy)

  • Massimiliano Lo Faro

    (Institute for Advanced Energy Technologies “Nicola Giordano” (ITAE) of the Italian National Research Council (CNR), 98126 Messina, Italy)

  • Stefano Trocino

    (Institute for Advanced Energy Technologies “Nicola Giordano” (ITAE) of the Italian National Research Council (CNR), 98126 Messina, Italy)

  • Antonino Salvatore Aricò

    (Institute for Advanced Energy Technologies “Nicola Giordano” (ITAE) of the Italian National Research Council (CNR), 98126 Messina, Italy)

Abstract

NiFe electrodes are developed for the oxygen evolution reaction (OER) in an alkaline electrolyser based on an anion exchange membrane (AEM) separator and fed with diluted KOH solution as supporting electrolyte. This study reports on the electrochemical behaviour of two different NiFe-oxide compositions (i.e., Ni 1 Fe 1 -oxide and Ni 1 Fe 2 -oxide) prepared by the oxalate method. These catalysts are assessed for single-cell operation in an MEA including a Sustainion™ anion-exchange membrane. The electrochemical polarization shows a current density of 650 mA cm −2 at 2 V and 50 °C for the Ni 1 Fe 1 anode composition. A durability test of 500 h is carried out using potential cycling as an accelerated stress-test. This shows a decrease in current density of 150 mA cm −2 mainly during the first 400 h. The performance achieved for the anion-exchange membrane electrolyser single-cell based on the NiFeO x catalyst appears promising. However, further improvements are required to enhance the stability under these operating conditions.

Suggested Citation

  • Sabrina Campagna Zignani & Massimiliano Lo Faro & Stefano Trocino & Antonino Salvatore Aricò, 2020. "Investigation of NiFe-Based Catalysts for Oxygen Evolution in Anion-Exchange Membrane Electrolysis," Energies, MDPI, vol. 13(7), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1720-:d:341430
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    References listed on IDEAS

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    1. Vincent, Immanuel & Bessarabov, Dmitri, 2018. "Low cost hydrogen production by anion exchange membrane electrolysis: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 1690-1704.
    2. Massari, Stefania & Ruberti, Marcello, 2013. "Rare earth elements as critical raw materials: Focus on international markets and future strategies," Resources Policy, Elsevier, vol. 38(1), pages 36-43.
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