A breakthrough in stainless steel technology at the University of Hong Kong has led to the development of stainless steel for hydrogen (SS-H2), a material that could revolutionize green hydrogen production. Led by Professor Mingxin Huang, the research team addressed key challenges in water electrolysis systems by developing SS-H2, which offers cost-effectiveness and corrosion resistance. This innovation is crucial for the global energy transition towards reducing carbon emissions. SS-H2's dual-layer passivation mechanism provides corrosion resistance comparable to titanium at a fraction of the cost, making it a game-changer in industrial hydrogen production. The material's performance extends to saltwater environments, paving the way for green hydrogen production from seawater. The economic impact of SS-H2 is substantial, potentially reducing material expenses significantly and enhancing the efficiency of hydrogen production systems. The innovative stainless steel also has implications beyond hydrogen production. It can revolutionize industries like ammonia production, oil refining, steelmaking, and methanol production by offering sustainable alternatives and reducing carbon footprints. Companies like Shell, Linde, and Bloom Energy are already integrating green hydrogen into their operations, showcasing the broader impact of materials like SS-H2. Professor Huang's team's breakthrough in stainless steel technology builds on their history of innovative materials research. By transitioning SS-H2 from the laboratory to industry, the focus is now on large-scale applications to drive down costs and emissions, contributing to a sustainable energy future and aligning with global decarbonization efforts.