A wall-jet ring disk electrode fabricated within a thin-layered micromachined cell

Toda, Kei; Oguni, Seiki; Takamatsu, Yukari; Sanemasa, Isao

doi:10.1016/s0022-0728(99)00430-1

Cited by 21 publications

(6 citation statements)

References 21 publications

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“…Because of this forced redox cycling (positive feedback effect), ,, a large current enhancement is observed and a steady-state condition is rapidly attained at both electrodes. Note that the collection efficiency (ratio between steady-state current at both collector and generator electrodes) is close to 100% ( I a / I c = 1), in agreement with results reported in the literature on the use of twin electrodes in thin-layered cells. ,, …”

Section: Resultssupporting

confidence: 89%

Use of Microdevices To Determine the Diffusion Coefficient of Electrochemically Generated Species: Application to Binary Solvent Mixtures and Micellar Solutions

et al. 2007

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A new approach for the determination of diffusion coefficient, D, of redox species is presented. It is based on the use of a home-constructed twin electrode within a thin-layered cell (TETLC) filled with a solution of electroactive species. Values of D are readily calculated, provided that the time required for the electrochemically generated species (produced at the generator electrode) to reach the collector electrode and the distance between both electrodes are known. Other parameters typically required to calculate D, e.g., concentration of the redox species, area of the electrode, and number of electrons transferred, are not needed. Diffusion coefficients of Fe(CN)(6)(3-), Ru(NH3)(6)(2+), and quinone were determined in water and, for Fe(CN)(6)(4-), in binary mixtures with glycerol. The results obtained were in good agreement with literature values. Aqueous glycerol solutions are microheterogeneous, as shown by the dependence on medium composition of the empirical solvent polarity scale, ET(30), determined by the solvatochromic probe RB. The responses of RB and the electrochemically generated species (Fe(CN)(6)(4-)) to the composition of aqueous glycerol mixtures were found to be remarkably similar. Measurements of D of ferrocene in micellar solutions of the cationic surfactant CTABr were also performed. Values of D for ferrocene and the ferrocenium cation are very different, in agreement with the chemical affinity of both species for the cationic micelle.

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Section: Resultssupporting

confidence: 89%

Use of Microdevices To Determine the Diffusion Coefficient of Electrochemically Generated Species: Application to Binary Solvent Mixtures and Micellar Solutions

et al. 2007

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“…To provide confidence for this method to be really useful and quantitatively applicable, the collection efficiency of a model analyte Fe(CN) 6 3À was further studied. The collection efficiency was found to increase as the flow rate decreased from 1 to 0.1 mL/min and was similar to that of a thin layer wall-jet ring disk electrode reported earlier with a collection efficiency of 80% at 0.015 mL/min [23].…”

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confidence: 87%

A Simple Electrochemical Approach Based on Inexpensive Wall‐Jet Screen‐Printed Ring Disk Electrode to Evaluate Oxygen Reduction Catalysts

et al. 2009

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A simple electrochemical approach to evaluate oxygen reduction catalysts using an inexpensive screen-printed ring disk carbon electrode system, consisting of a ring electrode deposited with MnO(2) and a disk electrode modified with the catalysts for study, is developed in this study. The as-prepared MnO(2) is selective and sensitive for H(2)O(2) oxidation in the presence of O(2) and is crucial to the proposed approach. By coupling with a wall-jet electrochemical cell, the product generated from the reduction reaction at the disk electrode can effectively be monitored at the MnO(2)- deposited ring electrode. Model catalysts of nano-Au and nano-Pd representing 2e(-) reduction of O(2) to H(2)O(2) and 4e(-) reduction to H(2)O, respectively, were evaluated as electrode materials in oxygen reduction reaction to demonstrate the applicability of the proposed method

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“…34 However, in a kinetic study, the real collection efficiency is calculated from the ratio of the ring current and the disk current. 18,19,35 The N% is usually constant with respect to rotation rate, and for a simple reversible redox reaction it depends on the geometry of the electrodes only.…”

Section: Enhanced Activity In Rrde Experimentsmentioning

confidence: 99%

In situ oxygenous functionalization of a graphite electrode for enhanced affinity towards charged species and a reduced graphene oxide mediator

et al. 2014

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A wall-jet ring disk electrode fabricated within a thin-layered micromachined cell

Cited by 21 publications

References 21 publications

Use of Microdevices To Determine the Diffusion Coefficient of Electrochemically Generated Species: Application to Binary Solvent Mixtures and Micellar Solutions

Use of Microdevices To Determine the Diffusion Coefficient of Electrochemically Generated Species: Application to Binary Solvent Mixtures and Micellar Solutions

A Simple Electrochemical Approach Based on Inexpensive Wall‐Jet Screen‐Printed Ring Disk Electrode to Evaluate Oxygen Reduction Catalysts

In situ oxygenous functionalization of a graphite electrode for enhanced affinity towards charged species and a reduced graphene oxide mediator

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