Sustained hydrogen peroxide production via MXene-functionalized supramolecular docking.
basic_science · Level V
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- Record sourced from PubMed, PMID 41832202.
- Also identified by DOI 10.1038/s41467-026-70693-9.
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Abstract
Direct photosynthesis of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) from air and water using metal/covalent-organic frameworks offers a sustainable alternative to the conventional energy-intensive anthraquinone process. However, current systems suffer from short operational lifetimes typically 10-100 h due to mismatches between O<sub>2</sub> capture efficiency and multielectron redox kinetics. Here, we report a supramolecular platform that integrates O<sub>2</sub> capture, H<sub>2</sub>O<sub>2</sub> synthesis, and in situ utilization, enabling continuous H<sub>2</sub>O<sub>2</sub> production for over 1000 h without sacrificial agents. Mesoporous bromine-substituted COFs are hydrogen-bonded to photothermal MXene, providing organized O<sub>2</sub> docking sites and columnar charge transport via σ-σ interactions and π-π stacking. Through a dual-pathway mechanism, the architecture achieves a competitive H<sub>2</sub>O<sub>2</sub> production rate of 2878 μmol g<sup>-1</sup> h<sup>-1</sup>, alongside complete pollutant removal and durable operation across diverse water sources and outdoor conditions. This work demonstrates a supramolecular design featuring programmable O<sub>2</sub> docking, directional charge transport, and localized H<sub>2</sub>O<sub>2</sub> utilization toward decentralized chemical manufacturing.