Design and optimization of electrochemical cell potential for hydrogen gas production

Nawar K. Al-Shara, Farooq Sher, Sania Z. Iqbal, Oliver Curnick, George Z. Chen

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    57 Citations (Scopus)
    185 Downloads (Pure)


    This study deals with the optimization of best working conditions in molten melt for the production of hydrogen (H2) gas. Limited research has been carried out on how electrochemical process occurs through steam splitting via molten hydroxide. 54 combinations of cathode, anode, temperature and voltage have been investigated for the optimization of best working conditions with molten hydroxide for hydrogen gas production. All these electrochemical investigations were carried out at 225 to 300°C temperature and 1.5 to 2.5 V applied voltage values. The current efficiency of 90.5, 80.0 and 68.6% has been achieved using stainless steel anodic cell with nickel, stainless steel and platinum working cathode respectively. For nickel cathode, an increase in the current directly affected the hydrogen gas flow rate at cathode. It can be hypothesized from the noted results that increase in current is directly proportional to operating temperature and applied voltage. Higher values were noted when the applied voltages increased from 1.5 to 2.5 V at 300°C, the flow rate of hydrogen gas increased from 1.5 to 11.3 cm3 min−1, 1.0 to 13 cm3 min−1 in case of electrolysis @ stainless steel and @ graphite anode respectively. It is observed that the current efficiency of stainless steel anodic cell was higher than the graphite anodic cell. Therefore, steam splitting with the help of molten salts has shown an encouraging alternate to current methodology for H2 fuel production.
    Original languageEnglish
    Pages (from-to)421-427
    Number of pages7
    JournalJournal of Energy Chemistry
    Early online date28 Apr 2020
    Publication statusPublished - Jan 2021

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Energy Chemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Energy Chemistry, 52, (2021) DOI: 10.1016/j.jechem.2020.04.026

    © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International


    • Electrochemical cell and Variable cathodes
    • Electrolysis
    • Hydrogen gas production
    • Splitting steam
    • Sustainable energy

    ASJC Scopus subject areas

    • Fuel Technology
    • Energy Engineering and Power Technology
    • Energy (miscellaneous)
    • Electrochemistry


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