Raw electrochemical data for: Charge-Controlled Comparison of Conventional and Multi-Step Chronopotentiometric Nickel Deposition for Alkaline Hydrogen Evolution

This dataset contains the raw electrochemical data supporting the article "Charge-Controlled Comparison of Conventional and Multi-Step Chronopotentiometric Nickel Deposition for Alkaline Hydrogen Evolution". Nickel coatings were electrodeposited on graphite rods (geometric area 0.283 cm²) from a Watts-type bath containing NiCl₂, NiSO₄ and H₃BO₃ by chronoamperometry (CA), chronopotentiometry (CP), cyclic voltammetry (CV) and multi-step chronopotentiometry (MSCP-10, MSCP-14 and MSCP-20) at a common nominal deposition charge of 0.42 C. The files include the recorded deposition curves and the hydrogen evolution measurements in 1.0 M KOH: linear sweep voltammetry at 1 mV s⁻¹ (without iR correction), electrochemical impedance spectra, cyclic voltammograms of the Ni(OH)₂/NiOOH redox region at 100 mV s⁻¹, and the 12 h chronopotentiometric durability test at −100 mA cm⁻². All measurements were made with a Gamry Interface 1000 potentiostat in a three-electrode cell, and potentials are given as recorded versus Ag/AgCl (3.5 M KCl). A README file describes the file naming, units and columns.