Experimental study demonstrates continuous solar-driven hydrogen production from atmospheric water using a rotary sorption system, indicating a viable pathway for green fuel in arid regions.
Water scarcity poses a critical challenge to sustainable hydrogen (H 2 ) production via electrolysis. Here, we present a solar‐driven, rotary sorption‐based atmospheric water harvesting (SAWH) system integrated with an electrolytic cell for decentralized H 2 generation. The core of the device is a hygroscopic porous gel (HSN–Li) featuring interconnected channels and photothermal TiN nanoparticles, enabling rapid sorption/desorption kinetics and high water uptake performance (up to 2.62 g water g sorbent −1 at 25°C and 60% RH). Coupled with a Janus membrane modified electrode, the system achieves efficient bubble detachment and continuous H 2 evolution. Under outdoor conditions, the prototype delivers a water yield of 1.55‐2.1 L water kg sorbent −1 day −1 and an ultrafast H 2 production rate of 8.4 L m −2 h −1 , powered entirely by solar energy. This multifunctional platform eliminates dependence on liquid water, offering a scalable, low‐cost route for H 2 generation in water‐stressed regions. Our approach establishes a new paradigm for integrated water harvesting and green energy production, paving the way for sustainable H 2 technologies.
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Li et al. (2026) studied this question.
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