“…However, there is still considerable potential for utilising this wastewater in the electrolysis process due to its high biomass content. 16,17 In recent years, a wide range of electrocatalytic materials have been developed for the H 2 evolution reaction (HER), but less research has been carried out on the development of materials for the water oxidation process. 18 To achieve successful green H 2 generation with minimal energy input, designing an efficient, low-cost, sustainable water oxidation catalyst is indispensable.…”