Syngas production by electrochemical CO 2 reduction in an ionic liquid based-electrolyte

Fundamentals and Challenges of Electrochemical CO2 Reduction Using Two-Dimensional Materials

“…1-butyl-3-methylimidazolium triflate (BMIM-OTF), and 1-ethyl-3-methyl-imidazolium triflate (EMIM-OTF), among others. 42 BMIM-BF 4 was shown to exhibit the highest current density with large faradic efficiency for CH 4 formation on an N-doped graphene-like electrode among five different ILs, BMIM-BF 4 , BMIM-PF 6 , BMIM-TFO, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIM-TF 2 N), and 1-butyl-3-methylimidazolium dicyanamide (BMIM-DCA). 43 Tuning the cation structure of imidazolium-BF 4 ILs showed that the C4 and C5 protons on the imidazolium ring are vital for efficient CO 2 reduction to yield CO on a Ag electrode.…”

Electrolyte Effects on the Electrochemical Reduction of CO2

“…The formation of these adducts also increases CO 2 diffusion rates with respect to aqueous solutions . Moreover, the capability of ionic liquids to absorb CO 2 physically and chemically can open a variety of options to efficiently convert CO 2 into valuable chemical products . Using ionic liquids at temperatures below room temperature will increase CO 2 solubility, but has also been reported to decrease mass transport as the viscosity of ionic liquids increases with decreasing temperatures …”

Electrochemical production of syngas from CO2at pressures up to 30 bar in electrolytes containing ionic liquid

“…This is a configuration that can be scaled-up for an industrial application. In our previous study [15] CO 2 -water co-electrolysis to produce syngas was investigated combining operation at high pressure (30 bar), at 45°C and the use of an ionic liquid (IL)-based electrolyte. Room temperature ILs are salts that usually comprise an organic cation and are liquid at temperatures below 100°C.…”

“…Chemical oxidation occurred at more positive potentials. In our previous study [15] using an electrolyte with a high content in IL, (1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIMOTf) and 10 wt. % of water) no corrosion currents were observed in the working potential range of -0.4 V--1.9 V vs. RHE both for the bimetallic cathodes and for the pure metals copper and zinc.…”