Hydrogen-bonded organic framework@conductive metal-organic framework heterostructures for ampere-level hydrogen peroxide production.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41345383.
- Also identified by DOI 10.1038/s41467-025-65887-6 and PMC identifier 12678433.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Electrochemical two-electron oxygen reduction reaction (2e<sup>-</sup> ORR) in neutral environments holds remarkable promise for sustainable hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) production. However, its practical application is largely hindered due to the scarcity of electrocatalysts with high selectivity and durability under ampere-level current densities. Herein, a hydrogen-bonded organic framework@conductive metal-organic framework (HOF@cMOF) heterostructure is designed for industrial-level H<sub>2</sub>O<sub>2</sub> electrosynthesis. Through integrating DAT-HOF (DAT=diaminotriazole) and Co-cMOF, Co-N bonds formed at the heterointerface modulates the electronic structure of Co sites, optimizing the adsorption strength of oxygen intermediates with improved activity and selectivity. Besides, the formation of built-in electric field drives the proton migration from DAT-HOF to Co-cMOF, facilitating the O<sub>2</sub> protonation to H<sub>2</sub>O<sub>2</sub> at Co sites. In further combination with the high proton donation capability of DAT-HOF and high conductivity of Co-cMOF, efficient H<sub>2</sub>O<sub>2</sub> production is achieved with a H<sub>2</sub>O<sub>2</sub> Faradic efficiency of 97.1 ± 0.4%, a H<sub>2</sub>O<sub>2</sub> yield of 738.9 mg h⁻<sup>1</sup> cm⁻<sup>2</sup> and a long-term durability over 100 h at 1200 mA cm⁻<sup>2</sup>. This work offers a high-performance electrocatalyst for promoting the industrial implementation of H<sub>2</sub>O<sub>2</sub> electrosynthesis.