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• W4378193744 abstract "Electrochemical conversion of CO2 requires selective catalysts and high solubility of CO2 in the electrolyte to reduce the energy requirement and increase the current efficiency. In this study, the CO2 reduction reaction (CO2RR) over Ag electrodes in acetonitrile-based electrolytes containing 0.1 M [EMIM][2-CNpyr] (1-ethyl-3-methylimidazolium 2-cyanopyrolide), a reactive ionic liquid (IL), is shown to selectively (>94%) convert CO2 to CO with a stable current density (6 mA·cm-2) for at least 12 h. The linear sweep voltammetry experiments show the onset potential of CO2 reduction in acetonitrile shifts positively by 240 mV when [EMIM][2-CNpyr] is added. This is attributed to the pre-activation of CO2 through the carboxylate formation via the carbene intermediate of the [EMIM]+ cation and the carbamate formation via binding to the nucleophilic [2-CNpyr]- anion. The analysis of the electrode-electrolyte interface by surface-enhanced Raman spectroscopy (SERS) confirms the catalytic role of the functionalized IL where the accumulation of the IL-CO2 adduct between -1.7 and -2.3 V vs Ag/Ag+ and the simultaneous CO formation are captured. This study reveals the electrode surface species and the role of the functionalized ions in lowering the energy requirement of CO2RR for the design of multifunctional electrolytes for the integrated capture and conversion." @default.
• W4378193744 created "2023-05-26" @default.
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• W4378193744 date "2023-05-25" @default.
• W4378193744 modified "2023-10-15" @default.
• W4378193744 title "A Bifunctional Ionic Liquid for Capture and Electrochemical Conversion of CO₂ to CO over Silver" @default.
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• W4378193744 doi "https://doi.org/10.1021/acscatal.3c01538" @default.
• W4378193744 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37342831" @default.
• W4378193744 hasPublicationYear "2023" @default.
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