Thin polymeric films formed by anodic electropolymerization of an iron(III) protoporphyrin IX dimethyl ester complex, [Fem(PP)Cl], on glassy-carbon or optically transparent Sn02 electrodes are effective catalysts for the electroreduction of H0N0/N02or NO to N20, N2, NH2OH, and NH3. The yield of N2 is enhanced in the compact environment of the redox polymer relative to that for comparable monomeric metalloporphyrins in homogeneous solution.
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