Table 1: Calculated dependence of the rest potential (open-circuit potential) on the hydroxyl anion concentration, and the oxygen partial pressure for oxygen reduction for the PC electrodes in KOH electrolyte.
Electrode
PCA = 80 mV versus SHE
1
0.6
0.5
2
1.3
0.9
3
1.9
1.4
4
2.6
1.9
PCB = 130 mV versus SHE
1
0.5
0.2
2
0.9
0.4
3
1.4
0.5
4
1.9
0.7
See (15); is the rest potential, and is the standard rest potential; refers to the possible number of electrons transferred for the proposed equilibrium reaction.