Seawater Electrolysis Emerges as Promising Green Hydrogen Production Method

Strategic Insights -

Researchers have identified seawater electrolysis (SWE) as a sustainable solution for producing green hydrogen, leveraging abundant saline water and renewable energy integration. A comprehensive review of SWE has revealed key challenges, technological advances, and future directions, covering material-level innovations to system-scale designs. The study highlights recent progress in electrocatalyst engineering and system-level solutions, demonstrating significant potential for cost savings and increased performance.

Key Takeaways:

  • Major technical barriers in SWE, such as chloride-induced corrosion, pH variability, and competition between oxygen evolution and chlorine evolution reactions, are critically examined in the review.
  • Recent progress in electrocatalyst engineering, particularly nanostructured catalysts like NiFe-based layered double hydroxides, has demonstrated superior selectivity, corrosion resistance, and operational stability.
  • System-level solutions, including desalination-integrated SWE units and renewable energy coupling, have shown significant potential to reduce overpotentials and capital expenditures, with some case studies reporting up to 46% cost savings.
  • Innovative approaches, such as membrane-less configurations, triboelectric-assisted systems, and microfluidic electrolyzers, have enhanced lab-scale performance and point toward scalable designs.
  • The review also addresses the techno-economic viability of SWE, especially in coastal regions with limited freshwater availability.
  • Future opportunities in SWE research lie in the development of next-generation catalysts, hybrid desalination-electrolysis systems, and supportive energy policy frameworks that will enable widespread adoption of SWE as a cornerstone of the global green hydrogen economy.
  • The research has been peer-reviewed and published in the International Journal of Hydrogen Energy.

Statistics:

  • Up to 46% cost savings have been reported in case studies of system-level solutions, such as desalination-integrated SWE units and renewable energy coupling.
  • The review highlights nanostructured catalysts like NiFe-based layered double hydroxides, which have demonstrated superior selectivity, corrosion resistance, and operational stability.
  • Innovative approaches, such as membrane-less configurations, triboelectric-assisted systems, and microfluidic electrolyzers, have enhanced lab-scale performance.

Sources:

  • Seawater Electrolysis for Green Hydrogen: a Critical Review of Challenges, Advances, and Future Directions. International Journal of Hydrogen Energy, 2025; 177.
  • American University. Sharjah, United Arab Emirates. www.elsevier.com; www.journals.elsevier.com/international-journal-of-hydrogen-energy/
  • NewsRx. Researchers at American University Target Renewable Energy (Seawater Electrolysis for Green Hydrogen: a Critical Review of Challenges, Advances, and Future Directions). Ecology, Environment & Conservation. October 24, 2025; p 587.