The results are presented in Figure and summarized in Table . The reported errors come from the linear regression y = a•x+b, where y is the excess electrons, x is the electrode potential, a the slope, and b the intercept of the regression line. The capacitance C has been estimated as C edl = -a • e -/area, with the area being the surface area of the supercell, and e -being the electron charge. The Φ ne=0 (PZC) has been estimated as Φ ne=0 = -b/a. The errors for slope and intercept are given from the standard error under the residual normality assumption. The given errors in Table for the Φ ne=0 and capacitance are obtained with the uncertainty propagation rules for division.