Artifacts and Protocol for Potential Recording in Non-Aqueous Electrochemical CO2 Reduction In our preliminary approach to investigate non-aqueous CO2 reduction through electrochemical measurements, we employed a three-electrode cell, a widely adopted configuration in electrochemical research, as extensively reported by previous researchers59-61. This configuration, as detailed in the previous section, involved the utilization of an Ag wire as the pseudo-reference electrode. For recording potentials relative to Ag/Ag+, a reference solution was employed, consisting of 0.1 mol% (0.02 molar) of Ag OTf with 0.4 mol% of the electrolyte under study. To maintain consistency, the salinity of the reference solution was matched with that of the working solution, thereby preventing salt transport induced by concentration potential between the compartments. To ensure proper separation between the reference solution and the working solution, we incorporated an ASTM ultrafine frit. Moreover, we chose to use a graphite counter electrode to mitigate any potential issues arising from metal deposition from a metallic counter electrode, which could interfere with the reaction mechanism under investigation at the working electrode. Figure 2.3. (a) Linear sweep voltammetry (LSV) results for CO2 reduction on a Pt wire electrode in anhydrous acetonitrile. The electrolyte and co-catalyst used were 0.5 mol% of MM NTf2. Subsequent cycles are indicated by the corresponding numbers. (b) Electrolysis results for the same system demonstrating the consistent production of CO with 100% faradaic efficiency. a b
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