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Efficient Electrocatalytic CO 2 Reduction Driven by Ionic Liquid Buffer-Like Solutions
Electrocatalysis of CO reduction in aqueous electrolytes containing the ionic liquid (IL) 1-n-butyl-2,3-dimethylimidazolium acetate ([BMMIm][OAc]) and DMSO proceeded at low overpotentials (-0.9 V vs. Ag/AgCl) at commercially-available Au electrodes, with high selectivity for CO production (58 % fara...
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Published in: | ChemSusChem 2019-09, Vol.12 (18), p.4170-4175 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Electrocatalysis of CO
reduction in aqueous electrolytes containing the ionic liquid (IL) 1-n-butyl-2,3-dimethylimidazolium acetate ([BMMIm][OAc]) and DMSO proceeded at low overpotentials (-0.9 V vs. Ag/AgCl) at commercially-available Au electrodes, with high selectivity for CO production (58 % faradaic efficiency at -1.6 V vs. Ag/AgCl). 0.43 mol CO
per mol IL could be absorbed into the electrolyte at atmospheric pressure, forming bicarbonate and providing a constant supply of dissolved CO
to the surface of the electrode. Electrocatalysis of CO
reduction in the electrolyte was facilitated by stabilization of CO
radical anions by the imidazolium cations of the IL and buffer-like effects with bicarbonate. |
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ISSN: | 1864-5631 1864-564X |
DOI: | 10.1002/cssc.201901076 |