Figure shows the three-electrode j-E characteristics of a Pt-coated Ni foam OER anode in a 0.500 M Na2CO3 buffer solution (bOER; pH = 6.8) for comparison to the same anode in a 2.0 M NaOH electrolyte. The more positive potentials required to pass the same anodic current in the Na2CO3 buffer can be attributed to the negative Nernstian shift of 0.44 V (= 0.0592 V x ΔpH) of the OER potential at the different pH values. The advantage of OER in the buffered electrolyte is that a Selemion anion exchange membrane can be used rather than a BPM without the need to include a VBPM contribution to the cell potential. We considered each of these anodic halfreactions in a pairing with an Au-coated Ni-foam CO2RR cathode in a 0.500 M Na2CO3 buffer solution. The three-electrode j-E characteristic of this cathode is also shown in Figure .