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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

Chronoamperograms showing reductive impact spikes recorded without (A) and in (B) a magnetic field and the derived impact charge and NP size distributions (C and D); electrolyte: 0.2 m phosphate buffer (pH 10), E (vs. SCE)=0.9 V. Reproduced with permission from Ref. 191 Copyright 2014, PCCP Owner Societies.
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fig30: Chronoamperograms showing reductive impact spikes recorded without (A) and in (B) a magnetic field and the derived impact charge and NP size distributions (C and D); electrolyte: 0.2 m phosphate buffer (pH 10), E (vs. SCE)=0.9 V. Reproduced with permission from Ref. 191 Copyright 2014, PCCP Owner Societies.

Mentions: Beyond being an analytical technique, the direct nano-impact method also provides a route for investigating more fundamental problems. A first example is the use of the technique for the study and monitoring of solution-phase nanoparticle agglomeration and aggregation.190 In a similar vein, the magnetic-field-induced agglomeration of Fe3O4 has also been directly evidenced.191 Figure 30 depicts examples of iron oxide reduction spikes and the associated size distributions obtained in the presence and absence of a magnetic field. Second, the electron-transfer kinetics and mechanism to the nanoparticles can be studied.183b,192 Third, the interaction of the nanoparticle with the electrochemical double layer is of utmost importance and the nano-impacts methodology has provided a direct route by which these interactions can be probed.193


Recent Advances in Voltammetry.

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

Chronoamperograms showing reductive impact spikes recorded without (A) and in (B) a magnetic field and the derived impact charge and NP size distributions (C and D); electrolyte: 0.2 m phosphate buffer (pH 10), E (vs. SCE)=0.9 V. Reproduced with permission from Ref. 191 Copyright 2014, PCCP Owner Societies.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig30: Chronoamperograms showing reductive impact spikes recorded without (A) and in (B) a magnetic field and the derived impact charge and NP size distributions (C and D); electrolyte: 0.2 m phosphate buffer (pH 10), E (vs. SCE)=0.9 V. Reproduced with permission from Ref. 191 Copyright 2014, PCCP Owner Societies.
Mentions: Beyond being an analytical technique, the direct nano-impact method also provides a route for investigating more fundamental problems. A first example is the use of the technique for the study and monitoring of solution-phase nanoparticle agglomeration and aggregation.190 In a similar vein, the magnetic-field-induced agglomeration of Fe3O4 has also been directly evidenced.191 Figure 30 depicts examples of iron oxide reduction spikes and the associated size distributions obtained in the presence and absence of a magnetic field. Second, the electron-transfer kinetics and mechanism to the nanoparticles can be studied.183b,192 Third, the interaction of the nanoparticle with the electrochemical double layer is of utmost importance and the nano-impacts methodology has provided a direct route by which these interactions can be probed.193

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