Researchers at Linköping University in Sweden have made strides in the realm of green hydrogen production by developing a triple-layered material that improves water-splitting reactions crucial for generating hydrogen using sunlight. This innovative material comprises cubic silicon carbide (3C-SiC), cobalt oxide (Co₃O₄), and a nickel hydroxide (Ni(OH)₂) catalytic layer. Each layer plays a specific role in facilitating the photochemical reaction that separates water into hydrogen and oxygen when exposed to sunlight. The unique structure of this material enhances charge separation, significantly increasing hydrogen yield and outperforming conventional materials by eightfold. Green hydrogen, produced from renewable sources like solar or wind power, offers a cleaner alternative to grey hydrogen, which is derived from fossil fuels and contributes significantly to carbon dioxide emissions. This advancement is particularly valuable for industries such as aviation and long-haul transportation, where decarbonization using batteries alone is challenging. Despite the promises of green hydrogen, a key efficiency barrier exists. Current materials for solar water splitting typically achieve low efficiencies of 1-3%. To make this technology commercially viable, efficiency levels must reach at least 10%. The research team at Linköping University is optimistic about reaching this goal, estimating a timeline of five to ten years with continued development. This advancement would enable the entire hydrogen production process to be powered directly by solar energy, reducing reliance on other renewable sources and cutting production costs. The research at Linköping University has been generously supported by various Swedish research foundations, including STINT, the Olle Engkvists Stiftelse, the ÅForsk Foundation, and the Carl Tryggers Stiftelse. Additionally, funding was provided by the Swedish Government's Strategic Research Area in Advanced Functional Materials at the university, highlighting the collaborative efforts driving innovation in sustainable energy systems.