• Photoelectrocatalytic reactions of metal complexes at chemically modified electrodes

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    • Keywords


      Photoelectrochemical cell; chemically modified electrode; Nafion; clay; Photoelectrocatalysis; solar energy conversion

    • Abstract


      One of the outstanding properties of the ion-exchange membranes is their multiphase structure with microheterogeneous environment. Recently we have shown that ion-exchange membranes such as Nafion and clay can be effectively used in preparing chemically modified electrodes with adsorbed photoactive and electroactive molecules. A new photogalvanic cell was constructed by coating one electrode with Nafion-[Ru(bpy)3]2+ and the other with clay-[Ru(bpy)3]2+. This new photogalvanic cell showed an additive photogalvanic response on visible light irradiation. The quenching rate constants,kq, for the reaction of excited state [Ru(bpy)3]2+ adsorbed into the membrane with Fe3+ ion and cobalt(III) complexes were determined by photoelectrochemical methods. The photoelectrocatalytic reduction of oxygen to hydrogen peroxide at chemically modified electrodes was carried out by using [Ru(bpy)3]2+ as sensitizer and macrocyclic cobalt(III) complexes as electron relay.

    • Author Affiliations


      Ramasamy Ramaraj1

      1. School of Chemistry, Madurai Kamaraj University, Madurai - 625 021, India
    • Dates

  • Journal of Chemical Sciences | News

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