Switching the Reaction Course of Electrochemical CO 2 Reduction with Ionic Liquids
Abstract
The ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]) offers new ways to modulate the electrochemical reduction of carbon dioxide. [emim][Tf2N], when present as the supporting electrolyte in acetonitrile, decreases the reduction overpotential at a Pb electrode by 0.18 V as compared to tetraethylammonium perchlorate as the supporting electrolyte. More interestingly, the ionic liquid shifts the reaction course during the electrochemical reduction of carbon dioxide by promoting the formation of carbon monoxide instead of oxalate anion. With increasing concentration of [emim][Tf2N], a carboxylate species with reduced CO2 covalently bonded to the imidazolium ring is formed along with carbon monoxide. The results highlight the catalytic effects of the medium in modulating the CO2 reduction products.
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In H cells, solutions with weak buffering abilities have been shown to increase the ratio of C2H4 to CH4.
“Thus in H cells, solutions with weak buffering abilities have been shown to increase the ratio of C2H4 to CH4. [205][206][207]”
From Electrochemical CO <sub>2</sub> Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design (2019) · cites this paper as [207]
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- Authors
- Sun, L., Ramesha, G. K., Kamat, P. V., & Brennecke, J. F.
- Affiliations
- University of Notre Dame (US)
- Corresponding author
- Kamat, Prashant V.
- Brennecke, Joan F.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-05-22
- Volume
- 30
- Issue
- 21
- Pages
- 6302-6308
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2332861710
- Cited by
- 279
- References
- 39
- Citations by year
- 2026: 11 · 2025: 15 · 2024: 32 · 2023: 22 · 2022: 29 · 2021: 28 · 2020: 33 · 2019: 27 · 2018: 15 · 2017: 14 · 2016: 28 · 2015: 22 · 2014: 3
- FWCI
- 7.37
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Langmuir (publishedVersion)
- PubMed (publishedVersion)
- Figshare (submittedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Physical Sciences › Chemical Engineering › Catalysis › Ionic liquids properties and applications
- Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
- Keywords
- electrochemical CO2 reduction, ionic liquids, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, supporting electrolyte, carbon monoxide production, oxalate anion, lead electrode, acetonitrile, tetraethylammonium perchlorate
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