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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

Simulated cyclic voltammograms for a fully reversible one-electron reduction in water at a hemispherical electrode at various support ratios. Parameters: CA=1 mm, DA=1×10−9 m2 s−1, re=1 mm, v=0.5 V s−1. All other diffusion coefficients are equal to DA.
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fig17: Simulated cyclic voltammograms for a fully reversible one-electron reduction in water at a hemispherical electrode at various support ratios. Parameters: CA=1 mm, DA=1×10−9 m2 s−1, re=1 mm, v=0.5 V s−1. All other diffusion coefficients are equal to DA.

Mentions: Dickinsons104 results are summarised in Figure 17, which shows simulated cyclic voltammograms for the reduction of some neutral species A at a 1 mm radius hemispherical electrode and a scan rate of 0.5 V s−1 at various levels of support. The zero field approximation described briefly above was used in the simulations it is seen that even 100 times as much supporting electrolyte as electroactive species is not sufficient in this case to exactly reproduce the fully supported result.


Recent Advances in Voltammetry.

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

Simulated cyclic voltammograms for a fully reversible one-electron reduction in water at a hemispherical electrode at various support ratios. Parameters: CA=1 mm, DA=1×10−9 m2 s−1, re=1 mm, v=0.5 V s−1. All other diffusion coefficients are equal to DA.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig17: Simulated cyclic voltammograms for a fully reversible one-electron reduction in water at a hemispherical electrode at various support ratios. Parameters: CA=1 mm, DA=1×10−9 m2 s−1, re=1 mm, v=0.5 V s−1. All other diffusion coefficients are equal to DA.
Mentions: Dickinsons104 results are summarised in Figure 17, which shows simulated cyclic voltammograms for the reduction of some neutral species A at a 1 mm radius hemispherical electrode and a scan rate of 0.5 V s−1 at various levels of support. The zero field approximation described briefly above was used in the simulations it is seen that even 100 times as much supporting electrolyte as electroactive species is not sufficient in this case to exactly reproduce the fully supported result.

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