Comparison of Cyclic and Square Wave Voltammetry of Irreversible EC Mechanisms

Čižmek, Lara; Komorsky‐Lovrić, Šebojka; Lovrić, Milivoj

doi:10.1002/celc.201500309

Cited by 9 publications

(3 citation statements)

References 43 publications

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“…In the family of pulse‐techniques square‐wave voltammetry (SWV) is one of the most advanced members, widely applied for quantitative electroanalysis, mechanistic study and kinetic measurements of electrode processes ,. The technique involves an alternating application of equal, oppositely oriented potential pulses at each step of the staircase ramp, being designed solely to provide information on the faradaic processes.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Faradaic Spectroscopy

2017

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For the purpose of simplification of the electrochemical study under conditions of square-wave voltammetry (SWV), a simplified form of potential modulation is proposed by replacing the staircase potential ramp with a constant potential. The resulting potential modulation, which could be considered as a pulse form of a chronoamperometric experiment (i. e., square-wave chronoamperometry), is provisionally termed as electrochemical faradaic spectroscopy, considering the fact that the main tool in the kinetic analysis is the frequency of the potential pulses applied. The proposed technique is illustrated with theoretical analysis of a simple, kinetically controlled electrode reaction of a dissolved redox couple and experimentally verified with the Eu 3 + (aq)/Eu 2 + (aq) redox couple at a mercury electrode. The square-wave chronoamperometry exhibits unique features of the response absent in both conventional SWV and chronoamperometry, widening the range of accessible electrode kinetics.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Faradaic Spectroscopy

2017

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“…The slope in the voltammogram makes it hard to determine the exact frequency when the peak disappears, but it lies between 10 and 15 Hz. This critical frequency is dependent on the rate of the following homogeneous step in an EC reaction mechanism, [43] which in our case corresponds to 30-45 s -1 . This is somewhat higher than found in the CV simulations (15 s -1 ).…”

Section: Square Wave Voltammetry Studiesmentioning

confidence: 88%

Redox behaviour of Cu-Aβ(4-16) complexes related to Alzheimer's Disease

Wiloch,

Linfield,

Baran

et al. 2024

Electrochimica Acta

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“…In the recent years we have made an attempt to develop such methods under conditions of square-wave voltammetry (SWV) [5], which was achieved by the virtue of the SW amplitude, inspecting the influence of the amplitude variation to the current [2] or position [3] of the voltammetric response. In a broader context let us note that the latter methods are only a small fraction of a plethora of novel studies of merit dedicated to the methodological and theoretical development of SWV [6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Characterizing electrode reactions by multisampling the current in square-wave voltammetry

Mirčeski

Guziejewski

Bozem

et al. 2016

Electrochimica Acta

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A B S T R A C TA novel and simple methodology for characterization of electrode processes by square-wave voltammetry (SWV), considered as a complex repetitive double-step chronoamperometric experiment, is proposed. Specifically, the sampling of the current at the very end of each potential pulse, as common in conventional SWV, is replaced with a multisampling protocol during each potential pulse, resulting in generation of a series of corresponding multisampled SW voltammograms constructed out of a single measurement. The evolution of such voltammograms reflects the chronoamperometric properties of the current in the course of each potential pulse, thus being specific to electrode mechanism and electrode kinetics. The proposed methodology could serve as a basis for modification of common SWV mode in commercially available instrumentation for the purpose of an advanced characterization of electrode processes. The methodology is theoretically illustrated by the analysis of three kinetically controlled common electrode mechanisms, such as the electrode reaction of a solution resident and surface confined redox couples, as well as the regenerative catalytic electrode mechanism (EC'), while the experimental verification is done with the electrode reaction of Eu 3+ /Eu 2+ and azobenzene/ hydrazobenzene redox couples.

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Comparison of Cyclic and Square Wave Voltammetry of Irreversible EC Mechanisms

Cited by 9 publications

References 43 publications

Electrochemical Faradaic Spectroscopy

Electrochemical Faradaic Spectroscopy

Redox behaviour of Cu-Aβ(4-16) complexes related to Alzheimer's Disease

Characterizing electrode reactions by multisampling the current in square-wave voltammetry

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