Temperature dependent electrochemical reduction of CO2 at temperature controllable-rotating disk electrode modified with bismuth film

Electrode Surface Heating with Organic Films Improves CO2 Reduction Kinetics on Copper

“…20 Recently, this concept has been applied to CO2R catalysis with both surface heating and cooling, achieving altered performance without significantly affecting the bulk temperature. 26,27 In these works, Bi rotating disk electrodes (RDEs) increased their activity for formate by a factor of 1.7 upon raising surface temperatures to 65 °C and planar Cu electrodes boosted their methane selectivity to 80% by cooling the electrode to -4.4 °C (and applying pulsed electrolysis). In contrast to previous works, surface heating on copper showed no clear trend in ethylene or methane Faradaic efficiencies with respect to temperature, especially in the absence of supporting EDTA in the electrolyte, supporting the fact that hydrodynamics can significantly impact performance.…”

Influence of Environmental Conditions on Electrocatalytic CO2 Reduction

“…However, for the sensitive electrocatalytic CO 2 RR, environmental conditions also play an important role in the reaction process. Many researchers have recognized the effects of changing conditions such as temperature, [43] pressure, [44] type of reactor, [45] and type of inlet gas on the electrocatalytic CO 2 RR. [46] For example, properly adjusting the temperature and pressure can increase the reaction rate, but also result in increased side reactions or decreased product selectivity.…”

Electrode Surface Heating with Organic Films Improves CO2 Reduction Kinetics on Copper

“…While all reports show increasing hydrogen and decreasing methane at elevated temperatures, ethylene promotion has varied between studies. − We expect that this discrepancy may be due to variable convective mass transport between systems, which has been shown to have a significant effect on selectivity at 25 °C and would become especially important at elevated temperatures due to decreased CO 2 solubility. − There is evidence from the electrochemical sensor literature that enhanced reactivity can be achieved by using local heating. − In the case of CO 2 reduction, this would overcome the trade-off associated with decreasing bulk CO 2 solubility . Recently, this concept has been applied to CO 2 R catalysis with both surface heating and cooling, achieving altered performance without significantly affecting the bulk temperature. , In these works, Bi rotating disk electrodes (RDEs) increased their activity for formate by a factor of 1.7 upon raising surface temperatures to 65 °C and planar Cu electrodes boosted their methane selectivity to 80% by cooling the electrode to −4.4 °C (and applying pulsed electrolysis). In contrast to previous works, surface heating on copper showed no clear trend in ethylene or methane Faradaic efficiencies with respect to temperature, especially in the absence of supporting EDTA in the electrolyte, supporting the fact that hydrodynamics can significantly impact performance .…”

“… 20 Recently, this concept has been applied to CO 2 R catalysis with both surface heating and cooling, achieving altered performance without significantly affecting the bulk temperature. 26 , 27 In these works, Bi rotating disk electrodes (RDEs) increased their activity for formate by a factor of 1.7 upon raising surface temperatures to 65 °C and planar Cu electrodes boosted their methane selectivity to 80% by cooling the electrode to −4.4 °C (and applying pulsed electrolysis). In contrast to previous works, surface heating on copper showed no clear trend in ethylene or methane Faradaic efficiencies with respect to temperature, especially in the absence of supporting EDTA in the electrolyte, supporting the fact that hydrodynamics can significantly impact performance.…”