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Controlled decomposition of SF₆ by electrochemical reduction.

Sébastien Bouvet¹, Bruce Pégot¹, Stéphane Sengmany²

¹Université Paris-Saclay, UVSQ, CNRS, UMR 8180, Institut Lavoisier de Versailles, 78035 Versailles Cedex, France.

Beilstein Journal of Organic Chemistry

|December 18, 2020

Summary

Researchers electrochemically reduced sulfur hexafluoride (SF₆) at room temperature, converting it into safe fluoride and sulfur. This electrochemical reduction method offers a new pathway for SF₆ management.

Keywords:

electroreduction fluoride anion redox potential sulfur hexafluoride

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Published on: October 15, 2015

Area of Science:

Electrochemistry
Environmental Chemistry
Materials Science

Background:

Sulfur hexafluoride (SF₆) is a potent greenhouse gas with significant environmental concerns.
Existing methods for SF₆ mitigation often involve high temperatures or complex processes.
Electrochemical reduction offers a potential alternative for controlled SF₆ transformation.

Purpose of the Study:

To investigate the electroreduction of SF₆ at ambient temperature.
To determine the number of electrons involved in the complete reduction of SF₆.
To quantitatively transform SF₆ into environmentally benign products.

Main Methods:

Utilized an array of platinum microelectrodes for enhanced electrical detection.
Performed electroreduction in acetonitrile as the solvent.
Measured the half-reduction potential of SF₆.

Main Results:

Established the half-reduction potential of SF₆ at -2.17 V vs Fc⁺/Fc.
Quantified the exact number of electrons required for complete SF₆ reduction.
Demonstrated the quantitative conversion of SF₆ to fluoride anion and sulfur.

Conclusions:

Ambient temperature electroreduction of SF₆ is feasible using platinum microelectrodes.
This electrochemical method provides a controlled pathway for SF₆ decomposition.
The process yields environmentally benign products, offering a sustainable SF₆ management solution.