A team led by Dr. Edison Ang at the National Institute of Education at Nanyang Technological University (NTU) and scientists at Zhejiang Ocean University has developed a groundbreaking new design for green hydrogen production. The design revolves around utilizing carbon nitride in a unique Janus homojunction structure, where two layers rich in nitrogen and carbon are stacked to create a powerful internal electric field for more efficient splitting of water molecules to produce hydrogen. The innovative design enhances the movement of electrons by creating a special interface between the carbon nitride layers, significantly improving the efficiency of hydrogen production. This advancement makes the process up to 14 times more efficient compared to traditional methods, marking a major leap towards sustainable energy solutions. The significance of this breakthrough lies in the potential for green hydrogen to become a key clean energy source. By producing hydrogen without harmful emissions, this design contributes to a cleaner and more sustainable world. Green hydrogen, as a powerful fuel, can be used across various sectors, from residential homes to transportation, offering a greener alternative to fossil fuels. Dr. Edison Ang emphasizes that by enhancing the efficiency of green hydrogen production through material innovation, the world is taking a crucial step towards combating climate change and reducing dependency on non-renewable resources. Published in Materials Horizons, this study highlights the role of nanoscale material design in advancing the field of clean and renewable energy.