The Effect of the Tribromide Complex Reaction on the Oxidation/Reduction Current of the Br2 / Br −  Electrode

Abstract

The Br2/Br– electrode reaction with tribromide complex formation reaction in the solution, a chemical-electrochemical (C-E) type reaction, has been investigated in order to determine the effect of the chemical reaction on the electrode kinetics. It is shown that the chemical reaction has little effect on the electrode kinetics at very slow homogeneous reaction rates, but has a more drastic effect on the electrode kinetics at faster homogeneous reaction rates. Also, the kinetics at the electrode are affected by changes in the concentrations of the active species (Br2, Br–, and Br3–) in the bulk solution as a consequence of the coupling effect of the chemical reaction on the electrode kinetics.