Cyclic voltammetry curves

Figure 1. a) Cyclic voltammetry curve recorded from a UHV prepared, well-annealed Pt(lll) crystal in dilute HF electrolyte. Crystal was immersed under potential control at 0.6 V (RHE) and swept cathodically to the limiting potential b) same experiment performed with the same crystal but not annealed after ion bombardment. 

Fig. 12.11 A schematic view for constructingmultilayerfilms on substrate, (b) Photographs of multilayer films of ITO/(PDDA/PSS-GS/PDDA/Mn02)n, n = 0, 5,10, and 15 for A, B, C, and D, respectively, (c) Cyclic voltammetry curves of ITO/(PDDA/PSS-GS/PDDA/MnO2)10 electrode at different scan rates, (d) Charge-discharge behavior of an ITO/(PDDA/PSS-GS/PDDA/MnO2)10 electrode at different current densities.

Figure 14.8 Cyclic voltammetry curves recorded using a Pt working electrode at a 100 mV/s sweep rate (CH3CN/CH2CI2 (4 1), supporting electrolyte NBu4BF4, 0.1 M, Ag wire pseudoreference). (a) Compound 4(4) + (b) chemically prepared 4(5)2 +. Curve (ii) refers to a second potential sweep following immediatly the first one (i).

Cyclic-voltammetry curve for a reversible system in an E-l plot. Data are in fact identical to those shown in Fig. 2.2. 

Current versus time was recorded and an exponential decrease in the intensity of the current was observed. When the current was close to 0, a new cyclic voltammetry curve of the solution was recorded, resulting in a voltammogram similar to the one represented in Figure 16 b). This confirmed that the electrogenerated tetracoordinated Cu(n) rotaxane had undergone a rearrangement to form the pentacoordinated Cu(n) rotaxane 16 2+. 

Figure 39 First two cyclic voltammetry curves for clean Ag in LiC104(PE0) recorded at a temperature of 323 K (upper panel) and 333 K (lower panel) initiated at the measured open circuit potential v = 5 mV/s.

Figure 3.17 Cyclic voltammetry curves for O2 reduction on a GC electrode in 0.05 M H2S04 aqueous solutions containing 02 at a concentration of0.24 mM, in the absence (solid line a), and in the presence of 0.25 mM Fe(lll)TMPyP (dashed line c). The single scan curve (b, thick line) was obtained forthe macrocyclic solution in the absence of 02 [50],...

Figure 3.18 Cyclic voltammetry curves (only scans in a single direction are shown) forthe reduction of dioxygen by FeTMPyP in 0.05 M H2S04 containing 02 at a concentration of 0.2 mM, for [Fe(l I l)TM PyP] = 0.0, 0.022, 0.13,0.25, 0.51 and 0.99 m M (top to bottom). Scan rate 50mVs k Electrode Area 0.39cm2.

Figure 11.11 Cyclic voltammetry curves (top) measured simultaneously with in situ electrical conductivity (bottom) forthe n-doped PMOThOD film electrode. The curve marked by...

Figure 11.12 Cyclic voltammetry curves for freshly prepared p-doped PMOThOD film, and for the 1st and the 2nd p-redoping cycles after accumulation of negatively charged carriers during consecutive n-doping. The scan rate is indicated.

Fig. 10.5.6. Cyclic voltammetry curves for an Au electrode modified w/ith the MB complex with -CyD. The peak current increases linearly with increasing MB concentration in the solution [46],...

Methylene blue acted as a mediator of electrons providing electrical contact between the electrode and the solution-resident enzyme laccase (Fig. 10.5.7) catalyzing reduction of oxygen to water [46], The catalytic effect is revealed by the wave shape of the cyclic voltammetry curve in the oxygen-saturated solutions and its increased limiting current. 

Rg. 4.9 The cyclic voltammetry curves and the simultaneously detected frequency changes obtained for the gold substrate (f) and the virgin carbazole layer deposited on a gold electrode (2), respectively. Solution 9 moldm HCIO4. Scan rate 50 mVs . (Reproduced from [132] with the permission of Elsevier Ltd.)... 

Yang [14] reported that the specific surface area of steam-activated carbon nanofibers (steam-ACNFs) decreased with increasing activation temperature (from 700 to 850 °C) due to the unification of micropores at elevated temperatures, whereas the electrical conductivity of ACNF electrodes and the accessibility of ions were increased according to cyclic voltammetry curves and impedance Nyquist plots. 

Fig. 17.4 Cyclic voltammetry curves of carbon-supported Pd nanocrystals, (a) In a nitrogen-saturated 0.1 M HCIO4 solution. Scanning rate = 50 mV s . (b) In a nitrogen-saturated 0.05 M H2SO4 -1- 0.05 M CUSO4 solutioiL Scamiing rate = 5 mV s . The double-layer currents were subtracted from the Cu UPD curves [61]...

Figure 7. Typical cyclic-voltammetry curve for anodic and cathodic directions of polarization in the case of a diffusion-controlled reversible redox process. /di is the double-layer charging current density and EpS the anodic and cathodic peak potentials. Inset shows potential E—time program applied to the electrode through a potentiostat used in a potentiodynamic configuration. The diagram is schematic.

Formic Acid Oxidation, Fig. 1 (a) Models representing formate pathway (top), direct pathway (center), and indirect pathway (bottom)-, (b) a typical cyclic voltammetry curve for formic acid... 

Figure 8.8 Schematic illustration of the fabrication procedure for the molecular imprinted polymer (MIP) and cyclic voltammetry curves comparing imprinted and non-imprinted (NIP) electrodes characterized using 1 mM [Fe(CN)6] . (Reproduced from ref. 60 with the permission of Elsevier.)...

While Fig. 10.14a, b contain 30% and 10% of Pt3Ni cubes (with the remaining particles being truncated-octahedrons), respectively, Fig. 10.14c contains only tmncated-octahedrons. The particle size is on the order of 5 to 7 nm. Only two types of facets are exposed of aU the nanocrystals, i.e., the 111 and 100. The fractions of the 111 surface area over the total surface area could be calculated based on the geometries of the shapes and the population statistics. The ORR kinetics of the nanocrystals were studied on RDEs in 02-saturated 0.1 M HCIO4, at room temperature, at 1,600 rpm, with a potential scan rate of 10 mV/s. Figure 10.15 shows comparison of polarization curves, cyclic-voltammetry curves, mass activities, and specific activities of the Pt3Ni nanocrystals to the standard TKK Pt/Vulcan carbon catalyst. As shown in Fig. 10.15d, almost-linear correlations were obtained for both mass activities and specific activities versus the fi action of the (111) surface area over the total surface area. A tabulated kinetic activity comparison is shown in Table 10.1. The mass activity and specific activity comparisons were made at 0.9 V versus RHE. 

In [2] it is shown that TiN has a high cathodic corrosion current. According to polarization and cyclic voltammetry curves there, between voltages of —0.3 and —1.5V for TIN coated electrode, the cathodic corrosion current is higher or comparable to the one fl om AISI 630 stainless steel. The reaction happening for negative voltages (smaller than —0.3 V) is ... 

Fig. 6.10 Cyclic voltammetry curve providing evidence of AIROF delamination, from [28], with...

Multiple choice If the peak potential difference on a single cyclic voltammetry curve is 58 mV, and the peak currents are proportional to the scan rate, this confirms that... 

True or false If the square root of the potential scan rate is proportional to the magnitude of the current peak for a cyclic voltammetry curve, then this information indicates that the reaction is... 

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