Voltammetric behavior of a ferrocene derivative: A comparison using surface-confined and diffusion-controlled species

Abstract

Description of cyclic voltammetry and an experiment that examines the voltammetric behavior of a ferrocene derivative in aqueous solution (diffusion-controlled) and inside an anionic polyelectrolyte film (diffusion-controlled).

Potentiometric measurement of state-of-charge of lead-acid battery by using a bridged ferrocene surface modified electrode

“…0.86 Acm-2 per unit Ys-1scan rate for both BSFc(J) and BSFc(II). The slopes are very close to the theoretical value of 1.0, indicative of a reversible redox process involving a species immobilised at the surface of an electrode [10]. The dependence of EPa of both BSFc(I) and BSFc(II) on H 2 S04 concentration can be seen from the results in Figure 3.…”

“…0.86 Acm-2 per unit Ys-1scan rate for both BSFc(J) and BSFc(II). The slopes are very close to the theoretical value of 1.0, indicative of a reversible redox process involving a species immobilised at the surface of an electrode [10].Potential vs seE I v The dependence of EPa of both BSFc(I) and BSFc(II) on H 2 S04 concentration can be seen from the results in Figure 3. As can be seen the Epa values were independent of the acid concentration in the range (1.0xlO-2 to lx10-7 mol L- As noted earlier, a major objective of this study was to establish whether the presence of a fCH 2 1 I I SH group in a BFc molecule improves the retainability of BFc on a gold substrate.…”

Electrochemical Considerations for Determining Absolute Frontier Orbital Energy Levels of Conjugated Polymers for Solar Cell Applications

“… The formal potential reflects the relative stabilities of Ox and Red, which in turn are influenced by medium and solvation effects. For a reversible redox active material that is confined/immobilized on the working electrode surface, the cyclic voltammogram is different from that observed with freely diffusing species 8–10. For surface confined materials, the theoretical potential difference between the cathodic and anodic waves should equal 0 mV, thus E pa = E pc and i pa / i pc = 1.…”

“…These examples show that the formal potential of ferrocene closely match the Connelly and Geiger value of 0.40 V vs. SCE in MeCN. There are other examples where the formal potential of ferrocene is assumed to be 0.40 V versus NHE (or 0.16 V vs. SCE) in 0.1 M Bu 4 N + PF 6 − /MeCN,1–22, 23 while other reports assume this value to be 0.20 V versus NHE in 0.1 M Bu 4 N + PF 6 − /MeCN (or –0.04 V vs. SCE) 24–27. Either of these two formal potentials may have originated from early reports,28, 29 but relatively recent experimental work has been done giving different values 19…”

Voltammetric, Spectroscopic, and Microscopic Investigation of the Oxidation of Solid and Solution Phases of Tetrathiafulvalene (TTF) to (TTF)2MO4(M=Mo, W)

“…Under the conditions of Figure , the peak potentials for oxidation ( ) and reduction ( ) are approximately 200 mV and 110 mV for MoO 4 2− and 230 mV and 160 mV for WO 4 2− , respectively, with peak‐to‐peak separations, =( − ) of 90 mV and 70 mV, respectively. These Δ E p values are larger than that of about 56 mV, expected for a reversible solution‐based diffusion controlled electron oxidation process and also much larger than the 0 mV expected for a reversible surface confined process …”