1. Latimer, W. M., The Oxidation States of the Elements and their Potentials in Aqueous Solutions, 2nd ed. (Prentice-Hall, New York, 1952).
2. Hodes, G., Cahen, D., and Manassen, J., Nature, (in the press).
3. Fujishima, A., and Honda, D., Nature, 238, 37–38 (1972).
4. Wrighton, M. W., Morse, D. L., Ellis, A. B., Ginley, D. S., and Abrahamson, H. B., J. Am. chem. Soc., 98, 44–48 (1976).
5. Gerischer, H., J. electroanal interfac. Electrochem., 58, 265–274.