K. Wikiel et J. Osteryoung, PULSE VOLTAMMETRIC TECHNIQUES APPLIED TO THE ANODIZATION OF COPPER MICROELECTRODES, Electrochimica acta, 38(15), 1993, pp. 2291-2296
Pulse techniques at microelectrodes have been used to show their utili
ty for the investigation of reactions important in corrosion and, spec
ifically, to characterize the anodization of copper in ethylene glycol
-water mixtures containing chloride. Pulse techniques render accessibl
e the entire voltammetric wave and yield values of equilibrium constan
ts T or complex formation from transient measurements. The formal valu
e of the formation constant for dichlorocuprate(I) in 50% v/v ethylene
glycol water is given by log beta(2) = 5.8. At sufficiently high conc
entrations of chloride and low current density the reaction product is
CuCl2-, whereas in the limiting current region the product is the neu
tral monochloro complex.