Measurement of the diffusion coefficients of [Ru(NH3)6]3+ and [Ru(NH3)6]2+ in aqueous solution using microelectrode double potential step chronoamperometry

Use of Redox Probes for Characterization of Layer-by-Layer Gold Nanoparticle-Modified Screen-Printed Carbon Electrodes

“…ψ was determined from E p with CVs obtained using scan rates v ranging from 10-200 mV s 13 FcMeOH, 34 and Ru(NH 3 ) 6 3+ , 35 respectively (Figure 3). The electroactive surface area calculated for bare SPCEs using Fe(CN) 6 3− was 1.81 (±0.44) × 10 −2 cm 2 ( Figure 3), which is smaller than A geo (2.52 (±0.29) × 10 −2 cm 2 ).…”

The use of differential pulse voltammetries to discriminate between the Butler–Volmer and the simple Marcus–Hush models for heterogeneous electron transfer: The electro-reduction of europium (III) in aqueous solution

“…The calibration of the working electrodes followed the widely adopted method [39][40][41][42]. By recording the steady-state limiting current of a 2 mM ferrocene acetonitrile solution with 0.1 M TBAP at 293 K, the radius of the electrode can be calculated by the following equation:…”

Dual-microdisk electrodes in transient generator–collector mode: Experiment and theory

“…The potential of the collector was held at a sufficient voltage to drive the diffusion limited oxidation of RuðNH 3 Þ 2þ 6 , and the generator was stepped to a voltage resulting in a step from zero current to the transport controlled reduction of RuðNH 3 Þ 3þ 6 . A simulation, as described in Section 1.2 and modified using the radius ratio given from single electrode potential-step chronoamperometry, was run using the diffusion coefficient ratio, D R = 1.39, as measured by the double potential-step chronoamperometry by Wang et al [63], and the half-gap ratio, d = 0.20, as obtained from the optical microscopy on the experimental dual microelectrode.…”