Introduction Molecular catalysis of electrochemical reactions is a field of intense activity because of the current interest in electrifying chemical transformations, including both electrosynthesis of organic molecules1 and production of fuels via small molecule activation.2-5 Rational design of molecular catalysts for a given reaction implies to decipher the mechanism,6 including degradation pathways.7 Non-destructive analytical techniques such as cyclic voltammetry (CV) are very useful for...