Electrocatalytic reduction of CO 2 in water on a polymeric [{Ru 0 (bpy)(CO) 2 } n ](bpy = 2,2′-bipyridine) complex immobilized on carbon electrodes

The electrocatalytic reduction of CO2 on a carbon/[{Ru0(bpy)(CO)2}n](bpy = 2,2′-bipyridine) modified electrode, prepared by electrochemical reduction of [RuII(bpy)(CO)2Cl2], leads to the selective and quantitative formation of CO even in pure aqueous electrolyte; the stability of the modified cathode is improved by using a preformed polypyrrolic film functionalized with this complex.