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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 kinetic parameters of the different kinetic models on the response of diffusional quasi-reversible and irreversible systems in cyclic voltammetry and reverse scan square wave voltammetry.
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fig04: Influence of the kinetic parameters of the different kinetic models on the response of diffusional quasi-reversible and irreversible systems in cyclic voltammetry and reverse scan square wave voltammetry.

Mentions: The effect of the asymmetric parameter γ on the voltammetric response is also analogous to that of α in BV. This is shown in Figure 4 for the response of diffusional systems in cyclic voltammetry and reverse scan square wave voltammetry under transient conditions. In the latter, as well as in the reverse scan of cyclic SWV, a cathodic peak and an anodic one can be observed on either side of the formal potential in the case of sluggish electron transfers.69 In both CV and SWV, the reorganisation energy affects the reductive and oxidative peaks of the voltammograms similarly (Figure 4 b), whereas the γ-value has an effect on the relative anodic/cathodic peak heights and the peak potentials. The reductive peak increases in height and shifts to less negative potentials as γ takes more positive values, as occurs in BV for α>0.5. This fact points out the greater flexibility of the aMH model for quantitative fitting of the voltammetry through the new kinetic parameter.


Recent Advances in Voltammetry.

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

Influence of the kinetic parameters of the different kinetic models on the response of diffusional quasi-reversible and irreversible systems in cyclic voltammetry and reverse scan square wave voltammetry.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig04: Influence of the kinetic parameters of the different kinetic models on the response of diffusional quasi-reversible and irreversible systems in cyclic voltammetry and reverse scan square wave voltammetry.
Mentions: The effect of the asymmetric parameter γ on the voltammetric response is also analogous to that of α in BV. This is shown in Figure 4 for the response of diffusional systems in cyclic voltammetry and reverse scan square wave voltammetry under transient conditions. In the latter, as well as in the reverse scan of cyclic SWV, a cathodic peak and an anodic one can be observed on either side of the formal potential in the case of sluggish electron transfers.69 In both CV and SWV, the reorganisation energy affects the reductive and oxidative peaks of the voltammograms similarly (Figure 4 b), whereas the γ-value has an effect on the relative anodic/cathodic peak heights and the peak potentials. The reductive peak increases in height and shifts to less negative potentials as γ takes more positive values, as occurs in BV for α>0.5. This fact points out the greater flexibility of the aMH model for quantitative fitting of the voltammetry through the new kinetic parameter.

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