Cyclic Voltammetry redox couple identification

[Mad For Science]

I am currently doing PhD research on gold leaching, part of which utilizes cyclic voltammetry. I have voltammograms with gold, silver and platinum RDE electrodes  of NaCl, NaOCl, NH₄Cl, CuCl₂ (With N₂, O₂ injection and without gas injection) at pH 2, 4, 6, 8, 10, 12 and FeCl₃ (With N₂, O₂ injection and without gas injection) at pH 2. I have determined the positions (current and potential versus Ag/AgCl) of all the peaks and I know how to determine E_1/2, ne^-, etc. The only thing I am not sure about is how to determine which peaks (reduction and oxidation peaks) pair to each other and how to assign peak pairs to specific redox couples. There are some I can identify through the literature (such as O₂ and H₂ gas evolution peaks etc.) and I can identify the silver chloride and silver oxide peaks with the silver electrodes from observations.

 

My question; is there a formal procedure or method for the identification of redox couples from CV peak data (possibly using Eh-pH diagrams, tables etc.)?