Proposing an unbiased oxygen reduction reaction onset potential determination by using a Savitzky-Golay differentiation procedure

Alternative view of oxygen reduction on porous carbon electrocatalysts: The substance of complex oxygen-surface interactions

“…Methanol tolerance experiments were conducted by adding 2.5 mL of methanol into the 60 ml of electrolyte solution (methanol concentration in the electrolyte solution ~1M). The onset potential was calculated by using the SODDM method (de Falco et al, 2020). The Tafel slope was evaluated by plotting the potential as a function of log(|jk|) where jk is a kinetic current density obtaining by the following equation:…”

Complexity of Biosolid-Derived Electrocatalysts Grants Their Excellent Performance in Oxygen Reduction Reaction

“…The values of the onset potential were calculated using the recently proposed unbiased method. 46 Even though they are less positive than that on Pt/C (0.887 V) (Figure 1E), for both series of samples, an improvement in the performance is noticed, with the addition of the surfactant modifier. Interestingly, linear trends between the onset potential and the amounts of surfactants were found with similar correlation coefficients (R 2 ∼ 0.92) (Figure 1F).…”

“…The onset potential was obtained using the unbiased second derivative method. 46 The Tafel slopes were obtained by plotting the potential as a function of log(|j k |), where j k is the kinetic current density (per electrode geometrical area) obtained by correcting the LSV current density, j d , for the diffusion limiting current density j l…”

The extent of carbon surface oxygen affinity and its effects on the activity of metal-free carbon catalysts in the oxygen reduction reaction: the interplay of porosity and N-, O- and S-enriched surface chemistry

“…LSV curves measured at 2000 rpm were used to obtain the onset potential using the unbiased second derivative method, 63 the electron transfer number n and the amount of H 2 O 2 produced, using equation 4 and 5 respectively: The stability of the samples was evaluated by measuring a current for 24 hours at the potential giving the maximum oxygen reduction current, with a constant O 2 flow through the electrolyte.…”

“…Figure 1. Current density for the urea modified samples (A) and thiourea modified ones (B); onset potentials for the urea modified samples (C) and thiourea modified ones (D); The kinetic current densities calculated using Koutecky-Levich equation for the urea modified samples (E) and thiourea modified ones (E).Onset potentials calculated from the LSV curves using the unbiased second derivative method63 …”