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- Title
Reduction of Carbon Dioxide to Formate at Low Overpotential Using a Superbase Ionic Liquid.
- Authors
Hollingsworth, Nathan; Taylor, S. F. Rebecca; Galante, Miguel T.; Jacquemin, Johan; Longo, Claudia; Holt, Katherine B.; de Leeuw, Nora H.; Hardacre, Christopher
- Abstract
A new low-energy pathway is reported for the electrochemical reduction of CO2 to formate and syngas at low overpotentials, utilizing a reactive ionic liquid as the solvent. The superbasic tetraalkyl phosphonium ionic liquid [P66614][124Triz] is able to chemisorb CO2 through equimolar binding of CO2 with the 1,2,4-triazole anion. This chemisorbed CO2 can be reduced at silver electrodes at overpotentials as low as 0.17 V, forming formate. In contrast, physically absorbed CO2 within the same ionic liquid or in ionic liquids where chemisorption is impossible (such as [P66614][NTf2]) undergoes reduction at significantly increased overpotentials, producing only CO as the product.
- Subjects
CARBON dioxide reduction; ELECTROLYSIS; IONIC liquids; CHEMISORPTION; SUPERBASES (Chemistry); ELECTROLYTIC reduction
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 47, p14370
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201507629