In this work, the performance of nickel-based anodes in an alkaline membrane electrolysis cell was investigated. In particular, the effect of the presence of a very low quantity of electro-deposited cobalt on a porous Ni electrode directly interfaced with a commercial anionic membrane was evaluated. The modified Ni–Co structure was investigated by XRD, SEM, EDS and XPS, and showed different characteristics compared to the starting Ni structure with a surface ratio of Co equal to Ni. The catalytic activity for the oxygen evolution reaction (OER) at the electrode/membrane interface increased considerably compared to pure nickel and reached the same level as a Ni/Pt reference electrode. We believe that this methodology, if further optimized, could open a new way to find an effective improved doping of the nickel anode able to work with alkaline membrane electrolysers.

Effect of cobalt deposition on Ni anodes for alkaline membrane water electrolyser

Pozio A.;Lisi N.;Della Seta L.;Dolci S.;
2020

Abstract

In this work, the performance of nickel-based anodes in an alkaline membrane electrolysis cell was investigated. In particular, the effect of the presence of a very low quantity of electro-deposited cobalt on a porous Ni electrode directly interfaced with a commercial anionic membrane was evaluated. The modified Ni–Co structure was investigated by XRD, SEM, EDS and XPS, and showed different characteristics compared to the starting Ni structure with a surface ratio of Co equal to Ni. The catalytic activity for the oxygen evolution reaction (OER) at the electrode/membrane interface increased considerably compared to pure nickel and reached the same level as a Ni/Pt reference electrode. We believe that this methodology, if further optimized, could open a new way to find an effective improved doping of the nickel anode able to work with alkaline membrane electrolysers.
Cobalt; Electrolysis; Nickel; OER
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/53051
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