Researchers at KAIST have developed a groundbreaking self-powered hydrogen production system that addresses the limitations of green hydrogen production. The system utilizes a water-splitting mechanism with an aqueous electrolyte, enhancing safety and enabling stable hydrogen production. Led by Professor Jeung Ku Kang, the research team introduced a non-precious metal catalyst material called G-SHELL, effective for various catalytic reactions, into zinc-air batteries. This innovation resulted in significantly higher energy density, power characteristics, and long-term stability compared to traditional batteries. The use of zinc-air batteries operating with an aqueous electrolyte ensures safety from fire risks. The system's potential to link with water electrolysis systems presents an environmentally friendly approach to hydrogen production. This research, featuring PhD candidate Dong Won Kim and master's student Jihoon Kim as co-first authors, was published in the international journal Advanced Science. The project received support from Korean government programs focused on material technology development and future technology research.