The work titled ‘Efficient electrically powered CO2-to-ethanol via suppression of deoxygenation’ was authored by a group authors largely from University of Toronto. Using Sustainion® membrane in conjunction with novel catalysts helped them record an ethanol Faradaic efficiency of ~52% (partialethanol current density ~156 mA cm−2) and an ethanol cathodic energy efficiency of 31%. The setup is shown below.
The novel materials used in this study help suppression of the deoxygenation of the intermediate HOCCH* to ethylene which promotes ethanol production. This work reports how the confinement effect, arising from an N-Clayer on Cu catalysts, taken together with the strong electron-donatingability of the N-C layer, enables advances in selectivity towards ethanolin CO2RR.
This publication follows a previous one from researchers of the same institute who also utilized a Sustainion® Membrane in their MEA to record 50% Faradaic efficiency for ethylene and 80% Faradaic efficiency for C2+ products which lead to concentrated ethanol generation.
These findings provide a route towards improving selectivity towards high-energy-densityethanol in CO2RR through catalyst design using a high conducting anion exchange membrane such as Sustainion®.
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