Green hydrogen, a clean fuel with zero emissions when produced using renewable energy, typically requires large amounts of purified freshwater. In response to this challenge, researchers at RMIT University have developed a groundbreaking technology that produces green hydrogen using wastewater as a catalyst. The team's innovation harnesses metals already present in wastewater, like platinum, chromium, and nickel, to enhance the hydrogen production process. By creating special electrodes with an absorbent carbon surface, the system captures these metals, turning them into stable catalysts that facilitate the water-splitting process. Moreover, the carbon material for the electrodes is derived from agricultural waste, adding to the sustainability of the system. Lab tests showed promising results as the system continuously produced hydrogen and oxygen for 18 days with minimal performance decline, using pre-treated wastewater representative of real-world conditions. This innovation not only offers a cost-effective and sustainable method for green hydrogen production but also contributes to pollution reduction and water conservation efforts. The research, conducted in collaboration with other institutions like the University of Melbourne and the Australian Synchrotron, marks a significant step towards addressing the challenges of water scarcity and pollution, benefiting both the energy and water sectors. The team is now looking to scale up the technology and is seeking partnerships with industry and government bodies to further develop and test the method with different types of wastewater.