Autocatalytic degradation of the extremely potent greenhouse gas SF<sub>6</sub> in basic alcoholic solution.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41353221.
- Also identified by DOI 10.1038/s41467-025-67158-w and PMC identifier 12800194.
- 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
Sulfur hexafluoride (SF<sub>6</sub>) is a persistent, highly potent greenhouse gas that is accumulating in the atmosphere at an increasing rate, exacerbating climate change. Whereas current degradation methods rely on forcing conditions to dissociate the inert molecule and additionally require post-treatment with basic solution to obtain harmless products, we show that SF<sub>6</sub> is mineralized in a single step at ambient temperature using potassium hydroxide in water/isopropyl alcohol mixtures under UV irradiation. The reaction proceeds via an autocatalytic mechanism, where in situ-generated acetone acts as a photosensitizer, leading to the selective formation of potassium sulfite and fluoride salts. Compared to existing methods, this approach eliminates the need for extreme temperatures, hazardous catalysts, or post-treatment, providing a scalable and easy-to-apply strategy for SF<sub>6</sub> degradation.