Ferriday, T.B.; Nuggehalli Sampathkumar, S.; Middleton, P.H.; Van Herle, J.; Kolhe, M.L. How Acid Washing Nickel Foam Substrates Improves the Efficiency of the Alkaline Hydrogen Evolution Reaction. Energies2023, 16, 2083.
Ferriday, T.B.; Nuggehalli Sampathkumar, S.; Middleton, P.H.; Van Herle, J.; Kolhe, M.L. How Acid Washing Nickel Foam Substrates Improves the Efficiency of the Alkaline Hydrogen Evolution Reaction. Energies 2023, 16, 2083.
Ferriday, T.B.; Nuggehalli Sampathkumar, S.; Middleton, P.H.; Van Herle, J.; Kolhe, M.L. How Acid Washing Nickel Foam Substrates Improves the Efficiency of the Alkaline Hydrogen Evolution Reaction. Energies2023, 16, 2083.
Ferriday, T.B.; Nuggehalli Sampathkumar, S.; Middleton, P.H.; Van Herle, J.; Kolhe, M.L. How Acid Washing Nickel Foam Substrates Improves the Efficiency of the Alkaline Hydrogen Evolution Reaction. Energies 2023, 16, 2083.
Abstract
Nickel foam substrates are frequently utilised for renewable energy applications as porous 3D-substrates. Preparation of these substrates usually includes an acid washing step, however the degree to which this step affects the final electrochemical performance after spray coating a catalyst ink is unreported. Herein, we report the effect of acid washing through physicochemical and electrochemical characterisation. The electrochemical performance was determined by repeated measurements of catalyst-coated nickel foam substrates both with and without the initial step of acid washing. Acid washing increased current density by 17.9% for the acid treated, MoS2-coated nickel foam electrode. This increment was affiliated with an electrochemically active surface area which increased by 87.1%, where Tafel analysis indicated that the acid treated, MoS2-coated electrodes facilitates the initial water dissociation step of the hydrogen evolution reaction with greater ease. Similar effects were also discovered for acid treated PtIr(1:3)/C-coated nickel foam substrates, albeit with less pronounced effects. Stability was also improved where the degradation rate was reduced by 18.9% for the acid treated, MoS2-coated electrodes. This proves the utility of acid washing nickel foam electrodes.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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