volume 20, issue 11, pages 987-988

Cleavage of Water by Visible-Light Irradiation of Colloidal CdS Solutions; Inhibition of Photocorrosion by RuO2

Kuppuswamy Kalyanasundaram 1
Enrico Borgarello 1
Duonghong Dung 1
1
 
Inslitut de Chimie Physique. Ecolc Polytechniquc Fédérale Ecublens CH‐1015 Lausanne (Switzerland)
Publication typeJournal Article
Publication date1981-11-01
General Chemistry
Catalysis
Abstract
The conversion of light into chemical fuels in photochemical devices equipped with semiconductor electrodes (e.g. of n-CdS) is associated with a serious problem: “holes” produced in the valence band of the semidonductor upon irradiation migrate to the surface where photocorrosion occurs. In mi-croheterogenous CdS systems this is remedied by a thin layer of RuO2. A CdS sol prepared in the presence of maleic anhydride/styrene copolymer has now been loaded with RuO2 and Pt; these CdS microelectrodes are surprisingly active catalysts for cleavage of H2O and H2S.

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