Hydrogen Bond Networks for Stable and Sustainable Production of Hydrogen From Seawater via Contact-Electro-Catalysis.
basic_science · Level V
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- Record sourced from PubMed, PMID 42454386.
- Also identified by DOI 10.1002/adma.74017.
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Abstract
Hydrogen production from seawater offers a sustainable pathway to obtain clean energy while alleviating the shortage of freshwater resources. However, the corrosive marine environment presents a significant challenge for conventional metal-based catalysts. Here, we propose a contact-electro-catalysis (CEC) strategy that employs nonmetallic fluorinated SiO<sub>2</sub> (F-SiO<sub>2</sub>) for effectively extracting hydrogen from seawater by mechanical agitations. In contrast to conventional fluorocarbon polymers that can hardly be electrified by contact with ionic liquids, F-SiO<sub>2</sub> group could still maintain high CE performance and thus exhibit 2.91 times higher H<sub>2</sub> yield. Mechanistic investigations reveal that ion exclusion by hydrogen bond networks at F-SiO<sub>2</sub>/water interface should be the dominant reason for such performance enhancement. In practical applications using real seawater from Bohai sea, the F-SiO<sub>2</sub>-based CEC delivers a stable hydrogen yield during a continuous ultrasonication for 1000 h. We expect this strategy could not only provide a sustainable platform for in situ hydrogen production from seawater by utilizing unlimited mechanical energy in the ocean, but also enable a feasible route for improving the liquid-solid contact-electrification (CE) especially under high salinity conditions.