Defect-based Lewis pairs on hydrophobic MnO mesocrystals for robust and efficient ozone decomposition.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40133324.
- Also identified by DOI 10.1038/s41467-025-58257-9 and PMC identifier 11937419.
- Licence recorded as CC BY-NC-ND.
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Abstract
Catalytic ozone decomposition is a promising technique for eliminating ozone from the environment. However, developing redox-active catalysts that efficiently decompose ozone while maintaining robust performance under high humidity remains challenging. Herein, we develop a hydrophobic carbon-coated mesocrystalline MnO (Meso-MnO@C) featuring a high density of manganese vacancies (V<sub>Mn</sub>)-based Lewis pairs (LPs) for catalytic ozone decomposition. The presence of V<sub>Mn</sub> induces the electronic restructuring in MnO, leading to the formation of V<sub>Mn</sub>-Mn acidic sites and adjacent lattice oxygen atoms as basic sites. These LPs act as electron donors and acceptors, facilitating rapid electron transfer and lowering the energy barrier for O<sub>3</sub> conversion to O<sub>2</sub>. The hydrophobic carbon layer protects against water accumulation on Meso-MnO@C in humid conditions. As a result, the Meso-MnO@C achieves nearly 100% O<sub>3</sub> decomposition at a high weight hourly space velocity of 1500 L⋅g<sup>-1</sup> h<sup>-1</sup>, with rapid reaction kinetics and stable performance for 100 hours under 65% relative humidity.