Chloride-mediated selective electrosynthesis of ethylene and propylene oxides at high current density

Science
Wan Ru LeowEdward H Sargent

Abstract

Chemicals manufacturing consumes large amounts of energy and is responsible for a substantial portion of global carbon emissions. Electrochemical systems that produce the desired compounds by using renewable electricity offer a route to lower carbon emissions in the chemicals sector. Ethylene oxide is among the world's most abundantly produced commodity chemicals because of its importance in the plastics industry, notably for manufacturing polyesters and polyethylene terephthalates. We applied an extended heterogeneous:homogeneous interface, using chloride as a redox mediator at the anode, to facilitate the selective partial oxidation of ethylene to ethylene oxide. We achieved current densities of 1 ampere per square centimeter, Faradaic efficiencies of ~70%, and product specificities of ~97%. When run at 300 milliamperes per square centimeter for 100 hours, the system maintained a 71(±1)% Faradaic efficiency throughout.

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Citations

Aug 14, 2020·Physical Chemistry Chemical Physics : PCCP·James B DerrValentine I Vullev
Jun 13, 2020·Science·John L Barton
Feb 20, 2021·Angewandte Chemie·Cheng TangShi-Zhang Qiao
Apr 2, 2021·ACS Central Science·Cuiju ZhuLutz Ackermann
Jun 19, 2021·IScience·Magda H BareckaAlexei A Lapkin
Jul 20, 2021·Chemical Science·Gracita M TombocKyoungsuk Jin
Aug 8, 2021·Proceedings of the National Academy of Sciences of the United States of America·Victor A BeckMarcus A Worsley
Aug 13, 2021·The Journal of Organic Chemistry·Huan WangJia-Xing Lu
Oct 28, 2020·Journal of the American Chemical Society·Arron C DeacyCharlotte K Williams
Oct 8, 2021·Proceedings of the National Academy of Sciences of the United States of America·Dohyung KimMatteo Cargnello
Nov 2, 2021·Chemical Communications : Chem Comm·Rui ShiYong Chen

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