A research team led by RMIT University has devised an experimental method to convert wastewater's high contaminant load into a valuable asset for producing green hydrogen, aiming to alleviate reliance on fresh water resources. By utilizing wastewater as a catalyst modifier, the team accelerates hydrogen production, overcoming the issue of high contaminant levels that typically render wastewater unsuitable. The innovation involves creating electrodes with an absorbent carbon surface derived from agricultural waste, attracting metals from wastewater to form efficient catalysts for water splitting. This approach not only streamlines the process but also contributes to a circular economy by utilizing cost-effective materials. The team successfully demonstrated continuous water splitting over 18 days in lab experiments using wastewater samples that had undergone partial treatment. The produced hydrogen and oxygen can be collected and utilized, while the oxygen can be reintegrated into wastewater treatment plants to enhance their efficiency. Looking ahead, RMIT University plans to refine the catalyst process for improved efficiency and universal applicability, potentially reducing the high costs of wastewater treatment and transforming it into a source of green hydrogen. The team envisions collaborations with global companies and water authorities to commercialize the technology on a larger scale, addressing pollution reduction, water scarcity, and energy challenges.