A Reduced Imidazolium Cation Layer Serves as the Active Site for Electrochemical Carbon Dioxide Reduction
Applied Catalysis B: Environmental(2020)
Abstract
•A suppression of HER after the first cycle of CV was found in the presence of EMIM-BF4 on a copper electrode.•A reduced EMIM+ cation layer can prohibit HER and may initiate CO2 reduction.•DFT calculation showed that the reduction from aqueous EMIM+ cation to adsorbed EMIM radical on Cu(111) occurs at −0.7 V.•Interaction of organic molecule with electrode material is vital for CO2 activation.
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Key words
Electrochemical carbon dioxide reduction,Ionic liquid,Reduced imidazolium cation,DFT calculation
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