Nonlinear electromagnetic phenomena and radiowave emission in electrochemical systems

Electromagnetic radiation in the range of radio frequencies is considered i n electrochemical systems where a constant potential is imposed on the meta l-solution interface along with a weak (amplitude of up to 10 mV) ac potent ial. It is shown that the system-generated electromagnetic signal U of the radio-frequency range may be a nonlinear quadratic function of the amplitud e of the ac potential E-V1 imposed on the electrode in the case where no ch arge transfer exists between the electrode and adsorbed species. The theore tical results are utilized for analyzing experimental data on the adsorptio n-desorption of aliphatic alcohols using the potential dependence of the si gnal of the second harmonic (SSH). The quadratic relationship between U and E-V1 is discovered for both left and right peaks in the SSH vs. E curve co rresponding to the adsorption of butanol and hexanol molecules on the mercu ry electrode.