An electrolysis cell for hydrogen gas production was constructed in the form of a fixed bed. The electrodes were made from 316L stainless steel in the form of cylinders 15 mm in height and diameter (aspect ratio = 1). The electrodes were immersed in an aqueous solution of 1 M, 1.5 M, and 2 M sodium hydroxide. Both anodic and cathodic solutions were pumped from a 30-liters stainless steel storage t...