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Issue 1, 1984
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Photochemical reduction of oxygen catalysed by colloidal cadmium selenide

Abstract

Colloidal CdSe sensitises the photoreduction of O2 and methyl viologen (MV2+) by cysteine. In the absence of cysteine the semiconductor is rapidly photo-oxidised. Rates of O2 photoreduction and yields of MV˙+ tend towards a maximum value for MV2+ concentrations of 10–2 mol dm–3. Flash-photolysis and steady-state measurements of O2 reduction are interpreted by a mechanism which shows that the low quantum yields are due to rapid recombination of photogenerated charge carriers. Only 2% of the photogenerated electrons are available to reduce O2.

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Article type: Paper
DOI: 10.1039/F19848000183
Citation: J. Chem. Soc., Faraday Trans. 1, 1984,80, 183-189

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    Photochemical reduction of oxygen catalysed by colloidal cadmium selenide

    J. R. Darwent, J. Chem. Soc., Faraday Trans. 1, 1984, 80, 183
    DOI: 10.1039/F19848000183

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