biostudies-literatureRen YSpecial Research Assistant Program of Chinese Academy of SciencesShandong Postdoctoral Innovative Talent Support ProgramNatural Science Foundation of Shandong ProvinceShandong Energy InstituteNational Natural Science Foundation of ChinaTaishan Scholar Foundation of Shandong ProvincePostdoctoral Fellowship Program of CPSFe2401702https://www.ebi.ac.uk/biostudies/studies/S-EPMC11220719biostudies-literatureUnknown11(25)Direct seawater splitting (DSS) offers an aspirational route toward green hydrogen (H₂) production but remains challenging when operating in a practically continuous manner, mainly due to the difficulty in establishing the water supply-consumption balance under the interference from impurity ions. A DSS system is reported for continuous ampere-level H₂ production by coupling a dual-cation exchange membrane (CEM) three-compartment architecture with a circulatory electrolyte design. Monovalent-selective CEMs decouple the transmembrane water migration from interferences of Mg²⁺, Ca²⁺, and Cl^- ions while maintaining ionic neutrality during electrolysis; the self-loop concentrated alkaline electrolyte ensures the constant gradient of water chemical potential, allowing a specific water supply-consumption balance relationship in a seawater-electrolyte-H₂ sequence to be built among an expanded current range. Even paired with commercialized Ni foams, this electrolyzer (model size: 2 × 2 cm²) continuously produces H₂ from flowing seawater with a rate of 7.5 mL min^-1 at an industrially relevant current of 1.0 A over 100 h. More importantly, the energy consumption can be further reduced by coupling more efficient NiMo/NiFe foams (≈6.2 kWh Nm^-3 H₂ at 1.0 A), demonstrating the potential to further optimize the continuous DSS electrolyzer for practical applications.Advanced science (Weinheim, Baden-Wurttemberg, Germany)A Dual-Cation Exchange Membrane Electrolyzer for Continuous H₂ Production from Seawater.PMC11220719219752712023000042SDBX2022032ZR2020ZD07GZB20230789ZR2023QB004SEI I202127tsqn202211277Fan FLi JZhang YRen YChen LCui GTang BWang ZZhao JfalseA Dual-Cation Exchange Membrane Electrolyzer for Continuous H₂ Production from Seawater.Direct seawater splitting (DSS) offers an aspirational route toward green hydrogen (H₂) production but remains challenging when operating in a practically continuous manner, mainly due to the difficulty in establishing the water supply-consumption balance under the interference from impurity ions. A DSS system is reported for continuous ampere-level H₂ production by coupling a dual-cation exchange membrane (CEM) three-compartment architecture with a circulatory electrolyte design. Monovalent-selective CEMs decouple the transmembrane water migration from interferences of Mg²⁺, Ca²⁺, and Cl^- ions while maintaining ionic neutrality during electrolysis; the self-loop concentrated alkaline electrolyte ensures the constant gradient of water chemical potential, allowing a specific water supply-consumption balance relationship in a seawater-electrolyte-H₂ sequence to be built among an expanded current range. Even paired with commercialized Ni foams, this electrolyzer (model size: 2 × 2 cm²) continuously produces H₂ from flowing seawater with a rate of 7.5 mL min^-1 at an industrially relevant current of 1.0 A over 100 h. More importantly, the energy consumption can be further reduced by coupling more efficient NiMo/NiFe foams (≈6.2 kWh Nm^-3 H₂ at 1.0 A), demonstrating the potential to further optimize the continuous DSS electrolyzer for practical applications.2024-01-01T00:00:00Z2024 Jul2025-04-04T23:54:42.752Z2025-04-04T23:54:42.752ZS-EPMC112207193856946310.1002/advs.202401702