Green hydrogen, generated through water electrolysis, is positioned as a sustainable energy source due to its lack of carbon dioxide emissions. Catalysts are crucial in this process, impacting the efficiency of hydrogen production. Researchers in Korea have successfully developed a new material that enhances green hydrogen production efficiency and reduces costs. The Korea Research Institute of Standards and Science (KRISS) introduced a high-performance base metal catalyst for AEM water electrolysis, which is more cost-effective and efficient than precious metal-based options. The catalyst, a molybdenum dioxide with nickel molybdenum structure incorporating ruthenium nanoparticles, shows enhanced durability and activity. It achieved a noteworthy solar-to-hydrogen efficiency of 22.8% and demonstrated stability in saline water. This breakthrough could reduce desalination costs significantly. Dr. Sun Hwa Park expressed plans to explore green hydrogen production using seawater to cut desalination expenses further. The collaboration between KRISS, Seoul National University, and Korea Institute of Materials Science led to significant advancements in green hydrogen research. The findings were published in a prestigious journal, marking a significant contribution to the field of chemical engineering.