fig2

Figure 2. First-principles and CALPHAD calculated results for Pt-Ir and Pt-Au systems: (A) Pt-Ir equilibrium phase diagram; (B) Pt-Au equilibrium phase diagram; (C) formation enthalpies of fcc-(Pt, Ir) and fcc-(Pt, Au) phases; and (D) surface diffusion activation energy for an atom on Pt-Ir (111) and Pt-Au (111) surfaces. Figure reproduced from Ref.^[42] with permission from Springer Nature.