0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0

pH

-1.0

-0.5

0.0

0.5

1.0

1.5E

/V H2O, H+, OH-

H2

O2

Pourbaix Diagram of H2OT = 298 K; p = 1 bar; p(O2, H2) = 1 bar

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.05.0 7.1

pH

-2.6-2.4-2.2-2.0-1.8-1.6-1.4-1.2-1.0-0.8-0.6-0.4-0.20.00.20.40.60.81.01.21.4

E/V

Al(s)A

l(OH

)3, s

Al2

O3 n

H2O

Al3+Al(OH)4-

AlO2-

H2O, H+, OH-

H2O, H+, OH-

H2

H2

O2

O2

Pourbaix Diagram of Ala(dissolved Al species) = 10-6; T = 298 K; p = 1 bar; p(O2, H2) = 1 bar

0.0 2.0 4.0 6.0 8.0 10.0 12.07.3

pH

-1.0

-0.5

0.0

0.5

1.0

1.5E

/V

Cu(s)

CuOCu2+

H2O, H+, OH-

O2

Cu 2O

Pourbaix-Diagram of Cua(dissolved Cu species) = 10-6; T = 298 K; p = 1 bar; p(O2, H2) = 1 bar

0.0 4.0 8.0 12.0

pH

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5E

/V

Pourbaix-Diagram of Fea(dissolved Fe species) = 10-6; T = 298 K; p = 1 bar; p(O2, H2) = 1 bar

H2

Fe(s)

H2O, H+, OH-

O2

Fe2O3

Fe2+

Fe3+

Fe3O4