Schematic illustration of the proposed DWE process with continuous generation of H 2 and O 2 in separate electrolytic and catalytic cells using Br – /BrO 3 – as a soluble redox couple. The oxidized bromate-rich (BrO 3 – ) electrolyte flows from the bottom of the electrolytic cell to the bottom of the catalytic cell, where it is reduced to bromide (Br – ) by a catalyst and flows from the top of the catalytic cell back to the top of the electrolytic cell. The green coating represents a semipermeable chromium hydroxide layer.
