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Related Concept Videos

Redox Equilibria: Overview01:23

Redox Equilibria: Overview

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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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 Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

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Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
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Balancing Redox Equations02:58

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Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
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Oxidation-Reduction Reactions03:11

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Oxidation–Reduction Reactions
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Oxidation and Reduction of Organic Molecules01:19

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Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
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Redox Mediators in Homogeneous Co-electrocatalysis.

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Area of Science:

  • Catalysis
  • Green Chemistry
  • Electrocatalysis

Background:

  • Homogeneous electrocatalysis is crucial for converting small molecules into valuable products for green energy and chemical feedstocks.
  • Industrial application of these systems requires improved catalyst activity and stability.
  • Enzymes utilize redox mediators (RMs) to deliver redox equivalents to active sites.

Purpose of the Study:

  • To summarize recent advancements in homogeneous co-electrocatalysis.
  • To discuss the potential of using redox mediators (RMs) in electrocatalytic systems.
  • To identify future research directions for this developing field.

Main Methods:

  • Review of recent literature on homogeneous co-electrocatalysis.
  • Analysis of systems employing homogeneous catalysts and redox mediators (RMs).
  • Discussion of substrate scope including alcohols, nitrogen, unsaturated organic substrates, oxygen, and carbon dioxide.

Main Results:

  • Co-electrocatalytic systems with homogeneous catalysts and RMs have been developed for various substrate conversions.
  • Redox mediators (RMs) can enhance catalyst activity and improve product selectivity.
  • These systems can alter catalytic cycles and avoid high-energy intermediates.

Conclusions:

  • Homogeneous co-electrocatalysis is a promising strategy for improving electrocatalytic processes.
  • Further fundamental advancements are needed to establish it as a general industrial strategy.
  • The field offers significant potential for future development in sustainable chemistry.