Table 1.

Structural data on the precursor adlayer formed in Br-containing solution

NaBr + PbBr2	Parameter	−1.20 V	−0.80 V
Hg	σi [Å]	1.01 ± 0.01	1.00 ± 0.01
Pb(OH)Brad-I	θI $d_{\mathrm{Hg}-\mathrm{Br}}$ [Å]		0.72 ± 0.04 2.03 ± 0.10
Pb(OH)Brad-II	θII $d_{\mathrm{Hg}-\mathrm{O}}$ [Å]		0.05 ± 0.02 2.86 ± 0.03
Solution	σs [Å]		1.00 ± 0.01

Results obtained from fits of the XRR data in 0.01 M NaBr + 0.25 mM PbBr₂ by the models described in the text. Given are the width of the Hg surface layer σ_i, the coverages and distance to the Hg surface layer of the precursor adlayer phases Pb(OH)Br_ad-I and Pb(OH)Br_ad-II, and the width of the interface to the electrolyte solution σ_s. The standard errors of the best-fit parameters were calculated by the covariance matrix method.