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Related Concept Videos

Electrodeposition01:08

Electrodeposition

1.8K
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox Reactions01:27

Redox Reactions

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

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Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
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Electrodes: Overview01:17

Electrodes: Overview

2.9K
 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
2.9K
Electrochemical Cells01:28

Electrochemical Cells

64
Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not...
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Precise Electrochemical Sizing of Individual Electro-Inactive Particles
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Redox-electrodes for selective electrochemical separations.

Xiao Su1, T Alan Hatton1

  • 1Department of Chemical Engineering, Massachusetts Institute of Technology, MA, United States.

Advances in Colloid and Interface Science
|October 8, 2016
PubMed
Summary
This summary is machine-generated.

Redox-active materials enable selective liquid separations by controlling electrochemical reactions. This approach offers advantages in adsorption selectivity and energy storage for advanced separation technologies.

Keywords:
Capacitive deionizationElectrochemical separationElectrosorptionIon-exchangePseudocapacitorRedox electrodes

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Separation Science

Background:

  • Redox-active materials offer unique capabilities for liquid-phase separations.
  • Unlike traditional capacitive deionization, redox-modified electrodes utilize Faradaic reactions for selective molecule binding.
  • These materials can function as pseudocapacitors or batteries, combining separation with energy storage.

Purpose of the Study:

  • To review the application of redox-interfaces in electrosorption and release processes.
  • To outline synthesis and preparation methods for redox-modified electrodes.
  • To discuss interaction mechanisms and future perspectives in redox-mediated separations.

Main Methods:

  • Review of literature on redox-active materials for separations.
  • Analysis of electrochemical control and Faradaic reactions at interfaces.
  • Examination of various material compositions including organic and inorganic compounds.

Main Results:

  • Redox-modified electrodes provide tunable selectivity for charged and uncharged molecules via electrochemical potential.
  • Diverse ion-exchange processes are associated with different redox material compositions.
  • Integration of redox systems offers combined adsorption selectivity and energy storage/recovery.

Conclusions:

  • Redox-interfaces represent a promising platform for advanced liquid-phase separations.
  • Electrochemical control offers a powerful tool for modulating molecular interactions and separation efficiency.
  • Future research directions include optimizing materials and exploring new applications for redox-mediated separations.