Pourbaix Diagrams(2) S.J.T.U. Phase Transformation and Applications E=1.229-0.05916pH 2H2O→O2+4H+4e 1.5 02 0.5 H20 -1 01-2、345678 101112131415 △G=-zFE pH=-log10(@)=-l0g1o[H*] .5 H2 pH→ Figure 6.3 Pourbaix diagram for water,hydrogen,and oxygen;Pand Po.=1 atm. SJ IU Inermoaynamics or Materiais Spring∠UUǒgx.J.Jln 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 (2) E = − 05916.0229.1 pH −+ 2 2 2 ++→ 44 eHOOH Δ = −zFEG ][log)(log10 10 + pH −= + −= H H α