ABSTRACT
Electron transfer reactions at interfaces represent one of the broadest classes of electrochemical processes. It involves a great number of reactions which consist of the exchange by of one or two electrons between the electrode and a reactant near its surface in solution. The physical mechanisms of the processes of electron transfer are rather general and similar to those for electron transfer in bulk solution in spite of a great variety of electrochemical systems differing both in the nature of the reactants and in the properties of the electrodes. Metal electrodes are convenient for the investigation of simple electron transfer reactions since the main changes induced by the variation of the electrode potential occur in the solution. Electrochemical electron transfer may be accompanied by change of the intramolecular structure of the reactants consisting of a change of valence angles and lengths of chemical bonds.
