The RDFs between Bi 7f sites and oxygen atoms of electrolyte water at different charged BiVO4(010)/NaCl interfaces are described in Fig. . The average number of adsorbed water molecules for each Bi 7f site is obtained by integrating the first peak of the Bi 7f -O RDFs, giving 1.0, 1.3 and 0.6 at PZC, positively charged and negatively charged interfaces, respectively. That means the number of adsorbed water at BiVO 4 surface depend on its surface charge density, while it remains unchanged at TiO 2 and SnO 2 surfaces. Although the adsorption and desorption processes can happen dynamically at the negatively charged side on TiO 2 , the number of adsorbed water is the same as in the case of PZC and positively charged side. These results give us molecular-level understanding for the structure and dynamics of metal oxide electrodes with weakly chemisorbed water, which is different from the oxides with strong water adsorption energy.