Integrated System for Photocatalytic Overall Water Splitting from Arid Air.
basic_science · Level V
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- Record sourced from PubMed, PMID 39629942.
- Also identified by DOI 10.1021/acs.nanolett.4c04185.
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Abstract
H<sub>2</sub> 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-SrTiO<sub>3</sub>:Al (MS) composite for in situ photocatalytic H<sub>2</sub> production using only atmospheric water and sunlight. The MS benefits from the hygroscopic MOF-801-hydrazine for water capture and the photocatalytic SrTiO<sub>3</sub>:Al for H<sub>2</sub> and O<sub>2</sub>. This system demonstrates effective in situ photocatalytic overall atmospheric water splitting in arid conditions, with a moisture adsorption capacity of 1.02 g<sub>H<sub>2</sub>O</sub> g<sub>MS</sub><sup>-1</sup> in 60 min at 30% relative humidity, and H<sub>2</sub> and O<sub>2</sub> production rates of 1033.1 and 494.3 μmol h<sup>-1</sup> g<sup><sub>S</sub>-1</sup>, respectively. This approach offers a novel solution for sustainable H<sub>2</sub> production using natural resources, crucial for water-scarce regions.