ELECTROREDUCTION OF CO2 TO C-2 AND C-3 COMPOUNDS ON BIS(4,5-DIHYDROXYBENZENE-1,3-DISULPHONATO)FERRATE(II)-FIXED POLYANILINE PRUSSIAN BLUE-MODIFIED ELECTRODE IN AQUEOUS-SOLUTIONS

Electrocatalytic reduction of CO2 has been performed using the bis(1,2-dihydroxybenzene-3,5-disulphonato)ferrate(II)-immobilized polyaniline\Prussian Blue-modified electrode in aqueous solutions. CO2 was reduced at a low overpotential under ambient condition, and lactic acid, together with C-2 and C-1 compounds, was obtained with the highest selectivity of about 88%. The most probable pathway of the reduction of CO2 is the stepwise hydrogenation by H-ads. Adsorbed hydrogen atoms were generated by the catalytic reduction of H+ ions near the PAn\PB interface where the doping and undoping processes of K+ ions proceed simultaneously.