More recently, AC electrolysis, where the flow of charge periodically changes direction, started to gain interest in the organic synthesis community. One of the experimentally observed properties of AC electrolysis is its ability to reduce over-oxidation/reduction products without using any mediators relative to its direct current (DC) counterpart. For example, Sattler et al. demonstrated that AC electrolysis solved the problem of the over-oxidation of disulfides to oxo species and over-reduction of disulfides to unidentified black precipitate in synthesizing unsymmetrical disulfides by an electrochemical sulfur-sulfur bond metathesis reaction. More recently, Kawamata et al. presented a unique chemoselective reduction of phthalimides to partially reduced hemiaminal or fully reduced lactam by applying different AC waveforms, which cannot be achieved by DC electrolysis, either. Despite these exciting findings, the mechanisms behind the controlled oxidation or reduction of substrates during AC electrolysis remain unclear. Due to the lack of mechanistic understanding, one must go through a time-consuming reiterative trial-and-error process to discover the optimal AC electrolysis conditions.