Redox reactions of dissolved substances on amalgamated platinum electrode modified with adsorbed porphyrin

In order to develop the electrodes convenient for investigating the high-rate redox reactions not distorted by a reagent adsorption, the modification of amalgamated Pt electrodes with a monolayer of irreversibly adsorbed porphyrin is studied. A specific feature of applied procedure is that the adsorption was performed at a controlled electrode potential from the aqueous solution, in which porphyrin in a low concentration was solubilized. The adsorbed porphyrin monolayer prevents immediate contact of dissolved reagent with the metal. At the same time, due to a strong electronic interaction of the system of conjugate π-electrons with the metal, the monolayer does not hamper the electronic transfer between the reagent and the electrode.