Alkaline Water Electrolysis Anode Materials

In recent years, considerable progress has been made in developing alkaline water electrolysis anodes. Several laboratories have reported oxygen evolution overpotential reductions of 100–150 mV or more, relative to uncatalyzed nickel. Some candidate anode materials have shown stable operation for thousands of hours under typical commercial electrolysis conditions. Preferred electrocatalysts have been the mixed metal oxides, especially the spinels and perovskites. Other metal oxides, alloys, and high surface‐area forms of nickel have also been studied. This review summarizes recent work in developing practical alkaline water electrolysis anodes.