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Related Concept Videos

Processes at Electrodes01:30

Processes at Electrodes

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The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
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Electrodeposition

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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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Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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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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Electrolysis03:00

Electrolysis

31.8K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Thermal and Photochemical Electrocyclic Reactions: Overview01:26

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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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The Computational Cation Electrode: A Case Study on CO2RR.

Emmanouil Pervolarakis1, Amanda Schramm Petersen1, Alexander Bagger2

  • 1Department of Chemistry, University of Copenhagen, Copenhagen, Denmark.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|April 7, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a computational framework to standardize modeling of electrolyte cations in CO2 electroreduction. This improves understanding of renewable energy storage and CO2 conversion to valuable products.

Keywords:
carbon dioxide fixationcationsdensity functional calculationselectrochemistry

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Area of Science:

  • Electrochemistry
  • Computational Chemistry
  • Materials Science

Background:

  • Electrochemical reduction of carbon dioxide (CO2) is key for renewable energy storage and producing valuable chemicals.
  • Electrolyte cations significantly influence CO2 electroreduction, but computational models lack standardization.
  • Current computational methods struggle to accurately represent cation effects at the electrode-electrolyte interface.

Purpose of the Study:

  • To develop a standardized computational framework for incorporating cation effects in CO2 electroreduction.
  • To establish a consistent reference state for metal cations in density functional theory (DFT) calculations.
  • To improve the accuracy of computational models for electrochemical reactions.

Main Methods:

  • Introduction of a computational cation electrode framework.
  • Combining cation reduction potential with an intermediate bulk state.
  • Evaluation of adsorption energetics across different metals using the new framework.

Main Results:

  • The proposed framework provides a consistent reference state for metal cations in DFT.
  • The new approach better mimics cation behavior at the electrode-electrolyte interface.
  • The choice of reference state significantly influences adsorption energetics.

Conclusions:

  • A unified protocol for modeling cation effects in CO2 reduction and related reactions is established.
  • The framework enhances the reliability of computational studies on electrochemical CO2 conversion.
  • This work facilitates more accurate predictions of catalyst performance.