One-step synthesis of calcium-doped copper oxide nanoparticles as an efficient bifunctional electrocatalyst for sensor and supercapacitor applications

Construction of Nickel Tungsten Oxide Anchored Carbon Nanofibers Modified with Glassy Carbon Electrode for Enhanced Electrochemical Detection of Metronidazole in Urine and Environmental Water Sample

“…Hence, the Randles-Sevcík equation was utilized to calculate the electroactive surface area (EASA) of prepared bare GCE, CNF/GCE, NiWO 4 /GCE, and CNF/NiWO 4 /GCE electrodes. 57 The electrode surface area was calculated by Eq. 1.…”

Development of an electrochemical sensor based on a barium-doped copper oxide anchored carbon black modified glassy carbon electrode for the detection of Metol

“…The linear plot can be determined by the equation I pa = 0.0223 [μM] + 3.9908 ( R 2 = 0.9902), and the limit of detection (LOD) was calculated based on the following equation. 41 LOD=3 D / B where D is the standard deviation of the three linear blank coefficients. B is the value of the slope of the plotted straight line, calculated from eqn (2).…”

An ultra-sensitive electrochemical sensor based on MOF-derived ZnO/Co3O4decorated on graphene for low-level monitoring of the α1-AR antagonist alfuzosin in tablets and human samples

“…S5a–d† shows the different scan rates obtained for Gr/GCE, ZnO/Co 3 O 4 /GCE, Co 3 O 4 /GCE, and ZnO/GCE, and their corresponding linearity plots are displayed in the insets of Fig S5a–d †. To calculate the electrochemical active surface area (EASA) of the modified electrodes, the Randles–Sevcik equation 57 (1) was applied. I p = (2.69 × 10 5 ) n 3/2 D 1/2 Av 1/2 C where ‘ I p ’ signifies the peak current ( I pa / I pc ), ‘ n ’ signifies the number of electrons involved in the rate-determining step ( n = 1), ‘ D ’ signifies the diffusion coefficient (cm 2 s −1 ), ‘ A ’ signifies the active surface area of the electrode (cm 2 ), and ‘ v ’ and ‘ C ’ signify the scan rate (mV s −1 ) and concentration (mol cm −3 ) of the redox probe [Fe(CN) 6 ] 3−/4− , respectively. The calculated EASA values of ZnO/Co 3 O 4 @Gr/GCE, Gr/GCE, ZnO/Co 3 O 4 /GCE, Co 3 O 4 /GCE, and ZnO/GCE were 0.41, 0.36, 0.29, 0.22, and 0.17 cm 2 , respectively.…”