Study on velocity fields of H2 during water electrolysis with KOH electrolyte comprising ionic liquid.

This study presents an analysis of the electrolysis process using nickel–iron electrodes with a 30% KOH electrolyte and a 30% KOH electrolyte with an additional 2.5 g of ionic liquid (BMI.BF4). The electrodes were placed 20 mm apart, and the current density at 55, 110, and 165 A/m². The process involved capturing and processing images of hydrogen generation to observe the influence of the ionic liquid on ionic conductivity. Results, depicted through images of vertical velocity, vorticity, and velocity field, indicate potential gains in hydrogen generation with larger volumes of bubbles and improved vertical displacement speeds of bubbles when adding ionic liquid to the electrolyte. [ABSTRACT FROM AUTHOR]