MAO Xinbiao, LIU Ying, CHEN Da, et al. Electrochemical reduction of CO2 in [NH2-emim]Br/[Bmim]BF4 ionic liquid composite[J]. CIESC Journal, 2017, (5): 2027-2034. DOI: 10.11949/j.issn.0438-1157.20161814.
MAO Xinbiao, LIU Ying, CHEN Da, et al. Electrochemical reduction of CO2 in [NH2-emim]Br/[Bmim]BF4 ionic liquid composite[J]. CIESC Journal, 2017, (5): 2027-2034. DOI: 10.11949/j.issn.0438-1157.20161814.DOI:
was synthesized from 2-bromoethylamine hydrobromide and N-methyl imidazole salt at reflux condition and characterized by 1H NMR and IR. Viscosity
electric conductivity and saturated carbon dioxide solubility in [NH2-emim]Br ionic liquid measured at 25℃ were 26.691 Pa·s
0.1130 mS·cm-1 and 82% by molar ratio
respectively. Binary ionic liquid composites of [NH2-emim]Br/[Emim]BF4
[NH2-emim]Br/[Bmim]BF4
and [NH2-emim]Br/[Bmim]PF6 were prepared at different mass ratios and used for electrochemical reduction of CO2. The results of cyclic voltammetry at room temperature showed that peak current of CO2 reduction in [NH2-emim]Br (0.5%)-[Bmim]BF4 was increased about 9 times than that in [Bmim]BF4 and reduction peak potential was shifted positively by 0.4 V. With viscosity decrease to 0.08227 Pa·s and electrical conductivity increase to 1.317 mS·cm-1
the binary ionic liquid composite is a good ionic liquid system for CO2 electrochemical reduction.