Intermolecular Interactions in Systems Containing Bi(III) – ClO−4 – H2O – Selected Amino Acids in the Aspect of Catalysis of Bi(III) Electroreduction

The paper describes recent results of studies on the accelerating effect of sulfur‐containing protein amino acids and water activity on multistep Bi(III) ion electroreduction at mercury electrode. The catalytic effect of methionine (Mt), cystine (CY) and cysteine (CE) was analyzed based on kinetic and thermodynamic parameters, which correlated with water activity. Investigations of adsorption of those amino acids at the electrode/solution interface provided information for the analysis of the electrical double layer and its influence on the kinetics of the electrode process. The multistep Bi(III) electroreduction process is controlled by the kinetics of active complexes formation, which precedes transfer of consecutive electrons.