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Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
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Electrochemistry under confinement.

Maximilian Jaugstetter1, Niclas Blanc1, Markus Kratz1

  • 1Analytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Bochum, Germany. kristina.tschulik@rub.de.

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Summary
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Electrochemistry under confinement is emerging as a distinct field, unifying research on nanomaterials. This review defines confinement types and explores their impact on electrochemical processes, kinetics, and selectivity.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Nanotechnology

Background:

  • Confinement effects in electrochemistry are scattered across disciplines.
  • Growing research highlights confinement as a unifying concept in nanomaterials and nanostructures.
  • Emergence of 'electrochemistry under confinement' as a new research discipline.

Purpose of the Study:

  • To establish coherent terminology and basic concepts for electrochemistry under confinement.
  • To review and categorize the effects of confinement on electrochemical processes.
  • To delineate boundaries between confinement effects and other phenomena like nano-effects.

Main Methods:

  • Defining six types of confinement relevant to electrochemistry.
  • Detailed discussion of nanochannel environments and colloidal single entity confinement.
  • Analysis of confinement's influence on mass transport and electric field distributions.

Main Results:

  • Confinement significantly alters local species concentration and driving forces.
  • Changes in mass transport and electric fields lead to modified reaction kinetics and product selectivity.
  • Identified applications in electrodeposition and electrochemical sensing within nanochannels.

Conclusions:

  • Electrochemistry under confinement offers a framework for understanding diverse electrochemical phenomena.
  • Future research should focus on the detailed mechanisms and applications of confinement-controlled processes.
  • This field holds significant potential for advancements in electrochemical sensing and material synthesis.