It can be observed that, all the charge curves are highly linear to their corresponding discharge counterpart, signifying the
Faradaic reactions along with double layer contribution.[47]
The construction of ultramicoelectrodes (UME) through a well-established and controlled elegant methodology allows the application of the technique to study the red-ox reactions and
faradaic phenomena on metals surfaces with controlled resolution which can be improved up to a nanometric range.
CV curves were measured as a function of temperature during both the cooling and heating cycles, and the extent of hybridization was determined by integrating the ferrocene
faradaic peak as described below.
The activation at -0.5 V was odd (if compared to other activation voltages) where all of its
faradaic processes appeared enhanced.
Furthermore, C[O.sub.2] reduction is typically characterized by low
faradaic efficiency due to the competition with the hydrogen evolution reaction (HER), which takes place at the same range of potentials [10].
In addition, Figure 5 shows a Tafel plot for the HCl[O.sub.4] media, revealing that the current density increases as a function of the imposed potential, which shows that detection of the
faradaic current began above 2.3 V, which is consistent with the response of the BDD because this type of electrode requires higher overpotentials to oxidize water [25].
The reason to use this technique is that it reduces the
faradaic current, producing lower limits of detection than cyclic voltammetry [43].
Diffusion of water and oxygen seems to occur in the coatings, indicating that a strict barrier-type coating behavior without
Faradaic reactions could explain the impedance spectra.