Fig. 3: Product analysis from CO2RR over Cu2O cubes deposited on glassy carbon. | Nature Communications

Fig. 3: Product analysis from CO2RR over Cu2O cubes deposited on glassy carbon.

From: Dynamic transformation of cubic copper catalysts during CO2 electroreduction and its impact on catalytic selectivity

Fig. 3

a SEM images of Cu cubes with three different average size distributions measured ex situ after 5 min and 12 h of CO2RR. b Partial current densities for H2, CO, CH4, and C2H4 obtained from time-resolved gas chromatography data acquired over 12 h. The currents are normalized by the exposed surface area of the as-synthesized Cu2O cubes. Note that this normalization does not consider the dynamic morphological changes observed under reaction conditions. Faradaic efficiencies of all measured reaction products after c 1 h and 12 h of CO2RR at −1.1 VRHE. The efficiency in c is slightly lower than 100% due to evaporation of liquid products and presumably non-linear product formation, since we average the liquid products over 12 h. The reference sample is a glassy carbon plate without catalysts. The error bars give the standard deviation of three measurements.

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