Upscaling studies for efficiently electric-driven CO2 reduction to CO in ionic liquid-based electrolytes

Electrocatalytic CO2 Reduction to C2+ Products in Flow Cells

“…[133] Ionic liquids have been widely unitized in CO 2 RR, with advantages of high electrical conductivity, good thermochemical stability, high CO 2 solubilities and wide electrochemical potential windows. [42,[134][135] Additionally, the imidazolium ring in the ionic liquid can stabilize the CO 2 anion radical intermediate through hydrogen-bond interactions, reducing the overpotential of CO 2 RR. [133,136] Yuan et al reported a ionic liquid-based electrolyte with 75% FE CO and 2% FE H2 in a wide cell voltage between 3.6 and 4.4 V (Figure 16b).…”

“…[133,136] Yuan et al reported a ionic liquid-based electrolyte with 75% FE CO and 2% FE H2 in a wide cell voltage between 3.6 and 4.4 V (Figure 16b). [135] Feng et al demonstrated that an ionic liquid (1-butyl-2,3-dimethylimidazolium tetrafluoroborate) increased the solubility of CO 2 , thus accelerating the mass transfer rate in CO 2 RR, and increasing the selectivity and current density of CO 2 RR. [136] Solid Electrolyte: Solid electrolytes have been developed as promising alternatives to traditional liquid electrolytes in CO 2 RR.…”

Electrochemical CO2reduction with ionic liquids: review and evaluation

“…While CO 2 R with IL-based electrolytes shows comparable stability to that with traditional electrolytes in a large number of studies. Moreover, Yuan et al 150 found that the CO selectivity in the IL-based electrolytes is 51.3% higher than that in 0.1 M KHCO 3 aqueous electrolytes after 10 h of continuous operation in an upscaling modified H-type cell, suggesting the higher stability of IL-based electrolytes. Therefore, IL-based electrolyte is not inferior to traditional electrolytes from the economic aspects.…”

Modulation of Nanobubble Behaviors through Ionic Liquids during CO2 Electroreduction

“…As a mild conversion approach, the electrochemical reduction of CO 2 is one of the most prospective methods for industry implementation. , Numerous efforts have concentrated on maximizing CO 2 conversion efficiency through catalysis exploitation, − electrolyte design, − and electrolyzer optimization. , However, most studies have been conducted on a small scale, which achieve the desired results only at low current densities. In comparison, industrial applications require higher current densities, where the effect of bubbles on the electrolytic performance is more significant than the electrocatalytic activity of the catalysts.…”