Pourbaix Diagrams (3) S.J.T.U. Phase Transformation and Applications 1.5 02 0.5 P02=1 atm H20 P02=10-4 atm 3456789101112131415 -0.5 PH2=10-4 atm H2 PH2=1 atm -1 pH→ Figure 6.4 Pourbaix diagram for water,hydrogen,and oxygen showing P,and Po at both 1 and 104 atm. SJTU Thermodynamics of Materials Springl2008©X.J.Jin Lecture 11 Electrochemistry llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Springl 2008 © X. J. Jin Lecture 11 Electrochemistry II Pourbaix Diagrams (3)