CHANGWON, South Korea — Korea Institute of Materials Science (KIMS), led by President Chul-jin Choi, announced that a research team led by Principal Researcher Sung Mook Choi of the Energy & Environment Materials Research Division, in collaboration with research teams led by Professor Min Ho Seo of Pukyong National University and Professor Won Bae Kim of Pohang University of Science and Technology (POSTECH), has developed a highly durable platinum–nickel (PtNi) hydrogen evolution catalyst that suppresses nickel (Ni) leaching through atomic ordering. Nickel leaching is a major cause of performance degradation in catalysts used for anion exchange membrane water electrolysis (AEMWE). The research addresses a longstanding problem in water electrolysis catalysts, which typically lose performance during prolonged operation, by stabilizing the catalyst structure at the atomic level. When applied to a system approaching the scale of an actual hydrogen production unit, the catalyst demonstrated less than 2% performance degradation after 3,000 hours of continuous operation. The technology is expected to advance the practical application of water electrolysis catalysts for green hydrogen production.