Fig. 6: Voltage break-down, operating parameters and their impacts. | Nature Communications

Fig. 6: Voltage break-down, operating parameters and their impacts.

From: A scalable membrane electrode assembly architecture for efficient electrochemical conversion of CO2 to formic acid

Fig. 6

a Cell voltage break-down using H2 reference electrode of the cell operated at 60 oC with Pt/C anode and 80 µm AEM. b FE and formic acid concentrations collected at 200 mA/cm2 with different anode DI water flow rate. c Cell voltage at 200 mA/cm2 when different concentrations of formic acid are collected at the anode. Error bars stand for S.D. from three different measurements. d Minimum selling price break down based on the performance at different DI water flow rates, using industrial national average electricity price of 0.068 $/kWh, and 4.5 $/kg hydrogen. (*: Assuming the minimum amount of formic acid oxidation at the anode with 10 M FA concentration, industrial national average electricity price of 0.068 $/kWh, and 4.5 $/kg hydrogen. **: Assuming minimum amount of formic acid oxidation at the anode with 1.3 M FA concentration, projected future electricity price of 0.03 $/kWh, and 2.3 $/kg hydrogen. Dashed line represents market price for 85 wt% FA).

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