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Proton activation in the overall water splitting process by fabricating an electrocatalyst in a bidentate atmosphere

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  • Brindhadevi, Kathirvel
  • Swathika, M.
  • Bharathi, Devaraj
  • Lee, Jintae

Abstract

The electrocatalytic reaction associated with 2NA-AMG-Ca, 2NA-AMG-Sr, and 2NA-AMG-Ba was studied systematically and evaluated for the hydrogen evolution reaction (HER) under acidic conditions. The catalyst, 2NA-AMG-Ba exhibited superior HER performance, with a low overpotential of 30.02 mV, a small Tafel slope of 65.57 mV/dec, and a high double-layer capacitance (33.79 mF/cm2), indicating abundant active sites. Electrochemical impedance spectroscopy confirmed fast charge transfer, while stability tests demonstrated excellent durability at 10 mA/cm2. Density functional theory (DFT) analysis revealed favorable hydrogen adsorption energies (ΔGH∗) and strong metal–support interactions across multiple facets. These combined experimental and theoretical insights establish 2NA-AMG-Ba as an extremely efficient and stable HER catalyst for the overall water splitting process.

Suggested Citation

  • Brindhadevi, Kathirvel & Swathika, M. & Bharathi, Devaraj & Lee, Jintae, 2026. "Proton activation in the overall water splitting process by fabricating an electrocatalyst in a bidentate atmosphere," Renewable Energy, Elsevier, vol. 256(PF).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pf:s096014812502035x
    DOI: 10.1016/j.renene.2025.124371
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    References listed on IDEAS

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    1. Veeramani, Krishnan & Janani, Gnanaprakasam & Kim, Joonyoung & Surendran, Subramani & Lim, Jaehyoung & Jesudass, Sebastian Cyril & Mahadik, Shivraj & lee, Hyunjung & Kim, Tae-Hoon & Kim, Jung Kyu & Si, 2023. "Hydrogen and value-added products yield from hybrid water electrolysis: A critical review on recent developments," Renewable and Sustainable Energy Reviews, Elsevier, vol. 177(C).
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