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

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Chloride-mediated selective electrosynthesis of ethylene and propylene oxides at high current density
Title:
Chloride-mediated selective electrosynthesis of ethylene and propylene oxides at high current density
Other Titles:
Science
Publication Date:
12 June 2020
Citation:
Leow, W. R., Lum, Y., Ozden, A., Wang, Y., Nam, D.-H., Chen, B., … Sargent, E. H. (2020). Chloride-mediated selective electrosynthesis of ethylene and propylene oxides at high current density. Science, 368(6496), 1228–1233. doi:10.1126/science.aaz8459
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.
License type:
Publisher Copyright
Funding Info:
This material is based on work supported by the Ontario Ministry of Colleges and Universities (grant ORFRE08-034), Natural Sciences and Engineering Research Council (NSERC) of Canada (grant RGPIN-2017-06477), Canadian Institute for Advanced Research (CIFAR) (grant FS20-154 APPT.2378), and University of Toronto Connaught Fund (grant GC 2012-13). D.S. acknowledges the NSERC E. W. R. Steacie Memorial Fellowship
Description:
This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on Volume 368 and 20 June 2020, DOI: doi.10.1126/science.aaz8459
ISSN:
1095-9203
0036-8075
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