Development of a hydrogen supply system based on alkaline water electrolysis with a converted anode reaction

We propose a method to improve the efficiency of hydrogen production via alkaline water electrolysis, by adding iodide ions to the electrolyte and converting the anode reaction from oxygen evolution to iodate ion generation. This change in the anodic reaction conversion can, in principle, render electrolysis for hydrogen production more energy efficient and diaphragm-free. Furthermore, the iodate produced at the anode may be regenerated into iodide using industrial waste heat or may serve as a reactant in valuable element recovery processes. This provides a new opportunity for the development of a novel cross-disciplinary system that goes beyond conventional hydrogen production. In this module research, we will conduct demonstration experiments of the proposed water electrolysis and evaluate its potential for industrial applicability.