Yathish Rai, T.Hegde, A.C.2026-02-032024Protection of Metals and Physical Chemistry of Surfaces, 2024, 60, 6, pp. 1084-109320702051https://doi.org/10.1134/S2070205124702514https://idr.nitk.ac.in/handle/123456789/20825Abstract: The present work focusses on the fabrication of new Ni–Co electrolyte for the development of Ni–Co electrocatalysts for water splitting application. All the Ni–Co alloy coatings were deposited from an acid sulphate bath and their electrocatalytic activity was tested in 1 M KOH. The Ni–Co alloys developed at range of current density from 3.0 to 6.0 A dm–2 were found to be good electrode materials for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as demonstrated by cyclic voltammetry (CV) and chronopotentiometry (CP) methods. The Ni–Co alloy deposits which are catalytically active for HER are found to be inactive for OER and vice versa. The change in surface appearance, composition, and the phase structure of all developed coatings were analysed using instrumental techniques like scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD), respectively. © Pleiades Publishing, Ltd. 2024.Cobalt alloysCobalt depositsCobalt metallurgyCyclic voltammetryElectrodepositionElectrolytesHydrogen evolution reactionNickel alloysNickel coatingsNickel depositsOxygen evolution reactionReservoir managementCatalytic studyEnergy dispersiveEvolution reactionsHydrogen evolution reactionsNi-Co alloyNi-co alloy coatingsOxygen evolutionScanning electronsWater splittingX-ray diffraction studiesPotassium hydroxide