The kinetics of peroxodisulfate anions electroreduction on the mechanically updated silver electrode was investigated by the impedance method. It is established, that impedance diagrams of the negative charged area on the metal surface could be successfully replaced by equivalent circuit which consists from the solution resistance and reaction resistance in parallel connection with constant phase shift element replacing the capacity of double electrical layer. The experimental data analysis, carried out within the framework of represented equivalent circuit, let us conclude, that kinetics of anions S$_2$O$_8^{2−}$ reduction reaction on the researched electrode is adequately described in terms of the phenomenological theory of slow discharge.
Lomonosov Moscow State University
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