87.9 Electrode potential and electromotive forces 7.9.4 pH-dependence of Pourbaix diagram ATLAS o ELECTROCHEMICAL LQUILIaEIA s84104s090H09 2.0 1.6 Feo 1.2 0.8 >0.4 Fe O.nH,O Marcel Pourbaix (1904-1998) s a Russian-born belgian chemist -0.4 Pourbaix(left)and Evans(right) -0.8 Fe 图形化方法( Graphic method, visualization) 14Pourbaix (left) and Evans (right) 图形化方法（Graphic method, visualization） 7.9.4 pH-dependence of  : Pourbaix diagram Marcel Pourbaix (1904–1998), a Russian-born, Belgian chemist. §7.9 Electrode potential and electromotive forces