China's solar-powered system produces 300 mL hydrogen per hour from air moisture

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China’s solar-powered system produces 300 mL hydrogen per hour from air moisture

The system combines atmospheric water harvesting and electrolysis to generate hydrogen even in low-humidity conditions.

InterestingEngineering.com | Sep 20, 2025

Researchers in China have developed a solar-powered system that can produce green hydrogen directly from moisture in the air.

Led by Prof. YIN Huajie at the Hefei Institute of Physical Science of the Chinese Academy of Sciences, the team created a self-sustaining system that does not require external water or energy.

Hydrogen is considered one of the most important clean fuels for the future. It has the potential to power industries, vehicles, and energy systems with minimal carbon emissions. However, producing hydrogen in a sustainable way remains a major challenge.

Most current methods for producing green hydrogen depend on high-purity water. This requirement makes it difficult to implement hydrogen production in areas where water is scarce.

The new system developed by the researchers addresses this problem in a novel way. Instead of relying on external water sources, it captures moisture directly from the air. By harvesting water from the atmosphere, the system makes it possible to produce hydrogen even in dry environments. This approach opens the door to sustainable hydrogen production in regions that previously could not support it.

Combining water harvesting and electrolysis...more
https://interestingengineering.com/energy/chinas-solar-powered-system-produces-hydrogen

Related: MIT's Breakthrough Hydrogel Makes Water From Air w/ ZERO Power