The final preparation of the cell for electrochemical testing involves connecting the WE electrolyte manifold port to waste and pumping electrolyte into the WE fixture through the electrolyte pumping port, which removes the air gap in the tubing and flushes electrolyte through the WE chamber, ensuring electrolyte contact to the membrane. A reference electrode, in this case Ag/AgCl (Innovative Instrument Inc. LF-2-24, 2 mm diameter, 24 mm barrel leak-free reference electrode), can be inserted via a tee adjacent to the electrolyte pumping port, in which case this electrolyte flow step contacts the reference electrode to the working electrode chamber near the working electrode surface. With the electrolyte management complete, the reactant gas flow commences, which in the present work is 3 sccm of CO2, followed by electrochemical experimentation. The electrolyte used in the present work is aqueous 1 M sodium bicarbonate.