Colloidal Redox Catalysts for Evolution of Oxygen and for Light-Induced Evolution of Hydrogen from Water

Authors

  • Dr. John Kiwi,

    1. Institut de Chemie physique, Ecole Polytechnique Fédérale CH-1015 Lausanne (Switzerland)
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  • Prof. Dr. Michael Grätzel

    Corresponding author
    1. Institut de Chemie physique, Ecole Polytechnique Fédérale CH-1015 Lausanne (Switzerland)
    • Institut de chemie physique, Ecole Polytechnique Fédérale CH-1015 Lausanne (Switzerland)
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  • Support of this work by the Swiss National Foundation (Grant No. 4.061.076.04) and by Ciba-Geigy, Basel (Switzerland), is gratefully acknowledged.

Abstract

Chemical utilization of the sun's radiation is very attractive aim. The evolution of oxygen and, on irradiation, hydrogen from water in the presence of redox catalysts are known, but rather slow processes. Colloidal ruthenium and other metals catalyze these reactions better than less finely divided materials.

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