A research team at the Korea Institute of Science and Technology (KIST) made a groundbreaking advancement in water electrolysis catalyst development. Led by Dr. Kim Myung-geun and Dr. Yoo Seong-jong, the team significantly reduced iridium usage to one-twentieth of that in commercial catalysts, addressing a major hurdle in global scale-up efforts. Their innovative catalyst incorporates a durable carbon support that minimizes oxidation and includes selenium to enhance durability. By reducing iridium usage while maintaining or improving performance, the catalyst demonstrated promising results in commercial water electrolysis facilities, outperforming existing catalysts. Dr. Kim emphasized the strategy presented for low-iridium catalyst development, with a focus on reducing production costs for green hydrogen. This research, supported by the Ministry of Science and ICT, showcases a pathway towards more sustainable and cost-effective green hydrogen production by leveraging innovative catalyst technology.