Researchers from the Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT) in China have developed an innovative electrocatalyst, Co-N/S-HCS, that demonstrates exceptional activity and stability in seawater electrolysis for sustainable hydrogen production. By leveraging an asymmetric CoN3S1 structure that enhances resistance to chloride corrosion, the catalyst shows improved performance in seawater-based electrolytes. This advancement opens up possibilities for practical applications in seawater-based energy systems, with promising results in self-driven seawater-splitting systems and seawater-based Zn-air batteries. The Co-N/S-HCS catalyst not only boosts hydrogen production rates but also offers potential benefits for desalination and energy storage applications. Prof. Huang Minghua highlights the significance of this work for sustainable hydrogen production in water-scarce regions, emphasizing cost reduction and environmental impact mitigation. The study's authors underscore the potential of Co-N/S-HCS in advancing seawater-resistant catalyst design and expanding sustainable energy solutions. With implications beyond hydrogen production, this research marks a critical step in the pursuit of scalable, eco-friendly energy systems and underscores the importance of sustainable innovation in meeting global energy demands.