UC Berkeley

In the original version of the manuscript, the fit function presented in the caption of Fig. 7 for the hydrated ions was wrong. The correct function was -2.2x + 7.2 (change highlighted in bold). Therefore the x-axis positions of the different cations in Fig. S17 which were obtained from this correlation function were also wrong. The correct Figure is as follows: (Figure Presented).. In addition, Fig. 6a used the wrong cation sizes for the organic cation data points. The updated Figure is given below: Previous studies electrodeposited a Ag monolayer on Pt or Au and found the PZC to be up to 0.25 V more positive compared to Ag(111). (Figure Presented). The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.