fig6
Figure 6. (A) Calculated H2O dissociation barriers and (B) Gibbs free energies of H adsorption on different theoretical models. (C) Summary of adsorption energy of various reactive intermediates on the three surfaces. (D) Schematic diagram of the catalyst preparation and the representation of the alkaline HER process on the Ni-γ-Fe2O3 interface. This figure is quoted with permission from Huang et al.[72] and Suryanto et al.[76].
