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Recent Advances in Voltammetry.

Batchelor-McAuley C, Kätelhön E, Barnes EO, Compton RG, Laborda E, Molina A - ChemistryOpen (2015)

Bottom Line: The transformation over the last decade of the level of modelling and simulation of experiments has realised major advances such that electrochemical techniques can be fully developed and applied to real chemical problems of distinct complexity.This review focuses on the topic areas of: multistep electrochemical processes, voltammetry in ionic liquids, the development and interpretation of theories of electron transfer (Butler-Volmer and Marcus-Hush), advances in voltammetric pulse techniques, stochastic random walk models of diffusion, the influence of migration under conditions of low support, voltammetry at rough and porous electrodes, and nanoparticle electrochemistry.The review of the latter field encompasses both the study of nanoparticle-modified electrodes, including stripping voltammetry and the new technique of 'nano-impacts'.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QZ, UK.

ABSTRACT
Recent progress in the theory and practice of voltammetry is surveyed and evaluated. The transformation over the last decade of the level of modelling and simulation of experiments has realised major advances such that electrochemical techniques can be fully developed and applied to real chemical problems of distinct complexity. This review focuses on the topic areas of: multistep electrochemical processes, voltammetry in ionic liquids, the development and interpretation of theories of electron transfer (Butler-Volmer and Marcus-Hush), advances in voltammetric pulse techniques, stochastic random walk models of diffusion, the influence of migration under conditions of low support, voltammetry at rough and porous electrodes, and nanoparticle electrochemistry. The review of the latter field encompasses both the study of nanoparticle-modified electrodes, including stripping voltammetry and the new technique of 'nano-impacts'.

No MeSH data available.


Related in: MedlinePlus

Influence of the electrode kinetic parameters on the amplitude-based quasi-reversible maximum of a one-electron reduction at a hemispherical microelectrode corresponding to a solution-phase redox system. .
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fig08: Influence of the electrode kinetic parameters on the amplitude-based quasi-reversible maximum of a one-electron reduction at a hemispherical microelectrode corresponding to a solution-phase redox system. .

Mentions: For quantitative analysis of the SWV response of nonreversible electrode processes, numerical simulation methods are necessary,3a semi-analytical solutions in the form of a system of recursive formulae being also available.94a Though frequency-based approaches have been usually considered for the investigation of the electrode kinetics,94a Mircevski et al.94i have recently proposed a new approach based on the variation of the SW amplitude rather than the time scale of the scans. According to the new amplitude-based strategy, the electrode kinetics is characterised from the variation of the separation of the peak potentials of the forward and backward components of the potential-corrected SW voltammogram and/or the peak current of the net response with the SW amplitude (ESW). This variation is sensitive to the kinetic parameters as shown in Figure 8 for the amplitude-normalised peak current (ΔIpeak/ESW). The amplitude-based methodologies have been applied with satisfactory results to the study of solution-phase and surface-confined3a,98redox systems.


Recent Advances in Voltammetry.

Batchelor-McAuley C, Kätelhön E, Barnes EO, Compton RG, Laborda E, Molina A - ChemistryOpen (2015)

Influence of the electrode kinetic parameters on the amplitude-based quasi-reversible maximum of a one-electron reduction at a hemispherical microelectrode corresponding to a solution-phase redox system. .
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4522172&req=5

fig08: Influence of the electrode kinetic parameters on the amplitude-based quasi-reversible maximum of a one-electron reduction at a hemispherical microelectrode corresponding to a solution-phase redox system. .
Mentions: For quantitative analysis of the SWV response of nonreversible electrode processes, numerical simulation methods are necessary,3a semi-analytical solutions in the form of a system of recursive formulae being also available.94a Though frequency-based approaches have been usually considered for the investigation of the electrode kinetics,94a Mircevski et al.94i have recently proposed a new approach based on the variation of the SW amplitude rather than the time scale of the scans. According to the new amplitude-based strategy, the electrode kinetics is characterised from the variation of the separation of the peak potentials of the forward and backward components of the potential-corrected SW voltammogram and/or the peak current of the net response with the SW amplitude (ESW). This variation is sensitive to the kinetic parameters as shown in Figure 8 for the amplitude-normalised peak current (ΔIpeak/ESW). The amplitude-based methodologies have been applied with satisfactory results to the study of solution-phase and surface-confined3a,98redox systems.

Bottom Line: The transformation over the last decade of the level of modelling and simulation of experiments has realised major advances such that electrochemical techniques can be fully developed and applied to real chemical problems of distinct complexity.This review focuses on the topic areas of: multistep electrochemical processes, voltammetry in ionic liquids, the development and interpretation of theories of electron transfer (Butler-Volmer and Marcus-Hush), advances in voltammetric pulse techniques, stochastic random walk models of diffusion, the influence of migration under conditions of low support, voltammetry at rough and porous electrodes, and nanoparticle electrochemistry.The review of the latter field encompasses both the study of nanoparticle-modified electrodes, including stripping voltammetry and the new technique of 'nano-impacts'.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QZ, UK.

ABSTRACT
Recent progress in the theory and practice of voltammetry is surveyed and evaluated. The transformation over the last decade of the level of modelling and simulation of experiments has realised major advances such that electrochemical techniques can be fully developed and applied to real chemical problems of distinct complexity. This review focuses on the topic areas of: multistep electrochemical processes, voltammetry in ionic liquids, the development and interpretation of theories of electron transfer (Butler-Volmer and Marcus-Hush), advances in voltammetric pulse techniques, stochastic random walk models of diffusion, the influence of migration under conditions of low support, voltammetry at rough and porous electrodes, and nanoparticle electrochemistry. The review of the latter field encompasses both the study of nanoparticle-modified electrodes, including stripping voltammetry and the new technique of 'nano-impacts'.

No MeSH data available.


Related in: MedlinePlus