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Abstract

Colloidal semiconductors and high surface area semiconducting powders have been tested as mediators in the light induced cleavage of water into hydrogen and oxygen as well as the cleavage of H-2S into H-2 and sulfur. Basic studies concerning charge transfer phenomena at the semiconductor/solution interface have been performed. New methods for dispersing highly active catalysts on the semiconductor surface have been developed. Overall light to chemical conversion efficiencies achieved in the water cleavage process are 0.1 to 0.2 %. Oxygen carrier function of the TiO-2 particles allows to sustain water cleavage at room temperature. Several systems have been scaled up and tested under sunlight.

Additional information

Authors: KALYANASUNDARAM K, INSTITUTE OF PHYSICAL CHEMISTRY, SWISS FEDERAL POLYTECHNIC INSTITUTE, EPF-LAUSANNE (SWITZERLAND);GRAETZEL M INSTITUTE OF PHYSICAL CHEMISTRY, SWISS FEDERAL POLYTECHNIC INSTITUTE, EPF-LAUSANNE (SWITZERLAND), INSTITUTE OF PHYSICAL CHEMISTRY, SWISS FEDERAL POLYTECHNIC INSTITUTE, EPF-LAUSANNE (SWITZERLAND)
Bibliographic Reference: EUR 9273 EN (1984) MF, 30 P., BFR 120, BLOW-UP COPY BFR 150, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123001600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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