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The concept of direct air electrolysis (DAE) for hydrogen production. a) A schematic diagram of the DAE module with a

The concept of direct air electrolysis (DAE) for hydrogen production. a) A schematic diagram of the DAE module with a

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Hydrogen gas (H 2 ) produced by water splitting using renewable energy, namely green hydrogen, is the most promising energy carrier of the low-carbon economy 1–6 . However, the geographic mismatch between renewables distribution and freshwater availability poses a significant challenge to green hydrogen production 7–9 . Here, we demonstrate a metho...

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Context 1
... production from the air was realized through our DAE module. As shown in the sandwich structure in Fig. 2, this module consists of a water harvesting unit in the middle and electrodes on both sides paired with gas collectors, powered by an external supply, for example, a solar panel. Importantly, the water harvesting unit also serves as the reservoir to hold the electrolyte. Porous medium such as sintered glass foam is soaked with ...
Context 2
... substance to absorb moisture from the air via the exposed surfaces. The captured water in liquid phase is transferred to the surfaces of the electrodes via diffusion and subsequently split into hydrogen and oxygen in situ. Quartz wool is tightly packed in between the glass foam and the electrodes to ensure the connectivity of the aqueous phase ( Fig. S2-S4). The glass foam filled with ionic solutions forms a physical barrier that effectively isolates hydrogen and oxygen from mixing. Deliquescent substances characterized with a strong affinity with water tend to extract moisture from the atmosphere at exposure, absorbing sufficient water to form an aqueous solution which is hygroscopic in ...

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