When looking Table and Figure together, One can see the shift in the orientation peak of water at positively charged surface ∆θ + is the largest in the case of BiVO 4 , this correlates well with C + H (BiVO 4 ) being the highest in the series. On the other hand, the shift in the orientation peak of water at negatively charged surface ∆θ -is the smallest in the case of BiVO 4 , which also correlates with the lowest capacitance value C - H (BiVO 4 ) among these three oxide systems. However, this qualitative picture is convoluted with the different water adsorption strengths and their effects on the polarization to be quantitative. In the previous work, it has been shown that water chemisorption would explain asymmetric EDLs seen at aqueous interfaces of oxide . In this work, it is found that EDLs are indeed nearly symmetric on BiVO 4 (010) surface which possess a weakest chemisorption of water molecules (Table ). When looking at the capacitance asymmetry of EDLs at metal oxide systems, a conspicuous monotonic increase is found in ∆C H when increasing the water adsorption energy E ads as shown in Fig. .