Hainan University, CAS Institute Breakthrough: Seawater Electrolysis for Cheap Hydrogen & Mg

Published: Dec 19, 2025 17:54

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[SMM Magnesium News] In response to the challenge of high cost in hydrogen production from water electrolysis, Hainan University, in collaboration with the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences, has broken through the technology of direct electrolysis of natural seawater for hydrogen production and magnesium extraction, achieving co-production of hydrogen and magnesium hydroxide and significantly reducing the production cost of hydrogen. On December 12, Beijing time, the relevant research results were published in the international academic journal Nature Communications. According to Tian Xinlong, the leader of the Marine Clean Energy Innovation Team at Hainan University, this technology can be carried out at room temperature, enabling the co-production of high-purity hydrogen and magnesium hydroxide, and the cost is lower than that of traditional high-energy-consuming processes. Experimental data show that while producing 1 kilogram of hydrogen, about 15 kilograms of high-purity magnesium hydroxide can be extracted, and the value of magnesium hydroxide can basically offset the cost of hydrogen production. Researchers said that this breakthrough technology is expected to contribute to the low-cost mass production of "green hydrogen".

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