Interrogating a Deeply Buried Electrode by Vibrational Sum Frequency Spectroscopy. Towards Understanding the Electroreduction at Ionic Liquid-Metal Interfaces
Note: why do we specifically study this electrochemical cell? Ionic liquids (ILs) attracted a wide attention within the electrochemical community due to their unique properties; such a high charge density, stable electrolytes and low volatility. In particular, imidazolium-based ILs were proposed as a promising electrolyte to use in CO2 fuel reactors, due to the CO2 high solubility. These gas flow-electrochemical cells, convert the CO2 into useful products such a CO, methane, ethanol . The development of this technology can address two important environmental problems: the excess of CO2 in the atmosphere and the use of a different energy sources than fossil fuels for transportation. However, CO2 electroreduction is energetically very expensive, and higher energetic efficiency and reaction rates need to be fulfilled to become feasible . Previous studies have shown, CO2 electroreduction in a water mixture with imidazolium–based ILs on Ag nanoparticles at lower overpotential . Our study help to understand the dynamics of the ionic liquid at electrified interfaces and the influence in the CO2electroreduction to improve these gas electrochemical reactors.
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