Hydrogen, a key renewable energy source, faces challenges in production efficiency. Electrolytic water splitting offers a clean production method, with seawater as a potential abundant source. However, seawater electrolysis is hindered by the chloride ion kinetics and corrosion issues. Researchers are exploring alternative anodic reactions like sulfion oxidation to lower energy consumption and enhance efficiency. A newly developed needle-like Co3S4 catalyst on nickel foam shows promising results in promoting the sulfion oxidation reaction for efficient seawater electrolysis. This bifunctional catalyst significantly reduces power consumption by 67.9% compared to traditional systems and offers a durable performance of 504 hours. The findings pave the way for sustainable and low-energy hydrogen production from seawater, addressing environmental concerns and energy efficiency requirements.