Abstract

A thin film composed of an ion-exchangeable layered oxide HxTi(2-x/4)⃞x/4O4(HTiO) (where the open square, ⃞, is vacancy) is studied as an electrode material. The thin film prepared on an indium tin oxide substrate functions as an electrode for the redox reaction of Ru(bpy)32+/Ru(bpy)33+without noticeable degradation. Lack of reaction in the presence of Fe(CN)64−/Fe(CN)63−indicates that reaction on this electrode occurs in the interlayers between titanate sheets. A Ru(bpy)32+-intercalated form of the electrode generates photocurrent under visible light irradiation.

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