Abstract
H2 produced through photocatalytic overall water splitting represents a sustainable energy. However, this approach is geographically constrained by freshwater availability, worsening the crisis in arid regions with abundant solar energy. This study introduces a MOF-801-hydrazine-SrTiO3:Al (MS) composite for in situ photocatalytic H2 production using only atmospheric water and sunlight. The MS benefits from the hygroscopic MOF-801-hydrazine for water capture and the photocatalytic SrTiO3:Al for H2 and O2. This system demonstrates effective in situ photocatalytic overall atmospheric water splitting in arid conditions, with a moisture adsorption capacity of 1.02 gH2O gMS-1 in 60 min at 30% relative humidity, and H2 and O2 production rates of 1033.1 and 494.3 μmol h-1 gS-1, respectively. This approach offers a novel solution for sustainable H2 production using natural resources, crucial for water-scarce regions.
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