Index of nomenclature S.J.T.U. Phase Transformation and Applications ·Nernst Equation:能斯特方程 。Pourbaix Diagrams:Pourbaix☒ ·Concentration Cells:浓差电池 ·Fuel cell::燃料电池 SJTU Thermodynamics of Materials Springl2008©X.J.Jin Lecture 11 Electrochemistry ll
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Springl 2008 © X. J. Jin Lecture 11 Electrochemistry II Index of nomenclature • Nernst Equation：能斯特方程 • Pourbaix Diagrams：Pourbaix图 • Concentration Cells：浓差电池 • Fuel cell：燃料电池
铅蓄电池 S.J.T.U. Phase Transformation and Applications 电流方向 正极 0000000T 电子流向 PbO,+4H*+SO+2e>PbSO+2H,O e e e 负极 PbO2 Pb Pb+SO-→PbSO4+2e SO好 总反应 PbO,+Pb+4H*+SO>2PbSO+2H,O PbSO4 PbSO4 H2SO4水溶液 SJTU Thermodynamics of Materials Springl2008©X.J.Jin Lecture 11 Electrochemistry Il
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Springl 2008 © X. J. Jin Lecture 11 Electrochemistry II 铅蓄电池 4 2OHPbSOeSOHPbO 2 2 4 4 2 +→+++ 2 + −− − − SOPb 4 +→+ 2ePbSO 24 负极 SOHPbPbO 4 2OHPbSO 2 2 4 4 →+++ + 22 + − 正极 总反应
Introduction S.J.T.U. Phase Transformation and Applications Voltage of a cell Standard voltage of the cell to the real or practical cell Concentration Temperature Pressure Variation of voltage with concentration SJTU Thermodynamics of Materials Springl2008©X.J.Jin Lecture 11 Electrochemistry ll
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Springl 2008 © X. J. Jin Lecture 11 Electrochemistry II Introduction Voltage of a cell Standard voltage of the cell to the real or practical cell • Concentration • Temperature • Pressure Variation of voltage with concentration
Nernst Equation S.J.T.U. Phase Transformation and Applications bB+cC=dD+eE △G=△G°+RT InJ, -EzF=-E°zF+RTInJ E=E°、 RT InJo E=E°_0.059161 gnJ Z SJTU Thermodynamics of Materials Springl2008©X.J.Jin Lecture 11 Electrochemistry Il
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Springl 2008 © X. J. Jin Lecture 11 Electrochemistry II Nernst Equation + = + eEdDcCbB α +Δ=Δ ln JRTGG o a +−=− ln JRTzFEEzF o a J zFRT EE −= ln o a J z EE 10 log 05916.0 −= o
Pourbaix Diagrams（1) S.J.T.U. Phase Transformation and Applications pH =-10g10()=-10g10[H*] 02+4H++4e→2H20 E°=1.229V E=E°+ 0.059161og10[H*]4Po, 4 E=1.229+0.059161ogo[H+] =1.229-0.05916pH SJTU Thermodynamics of Materials Springl2008©X.J.Jin Lecture 11 Electrochemistry Il
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Springl 2008 © X. J. Jin Lecture 11 Electrochemistry II Pourbaix Diagrams (1) ][log)(log10 10 + pH −= + −= H H α 2 →++ 244 2OHeHO −+ = 229.1 VEo 2 4 10 ][log 405916.0 EE PH O + += o pH E H 05916.0229.1 10 ][log05916.0229.1 −= += +