The potential diagram for oxygen at pH 7.
Successive one-electron reductions of molecular oxygen yield the superoxide radical (O2-) H2O2, the hydroxyl radical (OH) and water. Redox potentials at pH 7 for one-, two- and four-electron couples involving these states are presented as a potential diagram. The significance of each of these potentials is explained. The complete potential diagram enables complex systems to be rationalized, such as production of OH by H2O2 plus Fe3+.
Wood
P M
PM
Department of Biochemistry, University of Bristol, School of Medical Sciences, U.K.
D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010100:Oxygen; D013481:Superoxides
D013481:Superoxides; D010100:Oxygen