fig4
Figure 4. (A) The differential charge density for RuO2/FeNiOOH (the isosurface is set to 0.005 e Bohr-3. The yellow region corresponds to electron accumulation, while the cyan region denotes electron depletion); The reaction free energies of (B) water molecules and (C) hydrogen atoms on FeNiOOH and RuO2/FeNiOOH; (D) Optimized water dissociation models on the surfaces of FeNiOOH and RuO2/FeNiOOH.
