Photoelectrochemical behavior of chlorophyll a-lipid films on a platinum electrode in an aqueous electrolyte.
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概要
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The photoelectrochemical behavior of chlorophyll a-lipid mixed monolayers coated on a platinum electrode by the Langmuir-Blodgett technique was investigated under potentiostatic conditions in an aqueous electrolyte in the absence of redox agents. Under illumination, cathodic photocurrents were observed at electrodes coated with a sufficient number of monolayers. The quantum efficiency of the photocurrent was estimated to be about 10<SUP>−4</SUP>, much lower than that obtainable for dye-sensitized photocurrent on semiconductor electrode. The cathodic photocurrent increased with lowering in the pH of electrolyte. The possibility of the photoreduction of water by excited triplet chlorophyll a is discussed on the basis of observed pH dependence and correlation of the redox potentials involved.
- 公益社団法人 日本化学会の論文
著者
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MIYASAKA Tsutomu
Department of Biomedical Engineering Toin University
-
Honda Kenichi
Department Of Synthetic Chemistry Faculty Of Engineering The University Of Tokyo
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Fujishima Akira
Department Of Applied Chemistry Faculty Of Engineering The University Of Tokyo
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