It also does not escape our notice that this charge inversion due to specific adsorption of Cl -at the anodic polarized Au(100) electrode provides an alternative explanation for the non-monotonic change in the absorption THz spectra reported in recent experiments for gold electrode under positive bias. Furthermore, as mentioned before (Fig. ), the 120 degrees peak of water orientation is clearly visible for anodic polarized Au(100) but completely disappears for anodic polarized Au(111). Upon the adsorption of Cl -, H-bond network needs to response where the 130 degrees peak of water orientation shows up as a feature for both Au(111) and Au(100) (Figs. and). This means the H-bond networks on the anodic polarized Au(100) and the Cl-adsorbed Au(100) look more similar than those on the anodic polarized Au(111) and the Cl-adsorbed Au(111). Therefore, this structural feature of H-bond network on the anodic polarized Au(100) is expected to facilitate the Cl adsorption as compared to the case of anodic polarized Au(111).