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Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

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Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
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Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

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Oxidation–Reduction Reactions
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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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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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Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

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In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
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Updated: Mar 24, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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Oxidación eficiente del agua utilizando nanopartículas de CoMnP

Da Li1, Habib Baydoun1, Cláudio N Verani1

  • 1Department of Chemistry, Wayne State University , Detroit, Michigan 48202, United States.

Journal of the American Chemical Society
|March 15, 2016
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron nuevas nanopartículas de fosfuro de manganeso de cobalto (CoMnP) para una catálisis eficiente de la oxidación del agua. Estos catalizadores abundantes en la Tierra son prometedores para la producción sostenible de energía alternativa a través de la división del agua.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Catálisis
  • La electroquímica

Sus antecedentes:

  • Los catalizadores eficientes de oxidación del agua son cruciales para la energía sostenible.
  • El desarrollo de catalizadores a partir de materiales abundantes en la Tierra es un desafío clave.

Objetivo del estudio:

  • Síntesis y caracterización de nuevas nanopartículas de fosfuro de manganeso ternario de cobalto (CoMnP).
  • Evaluar la actividad catalítica de la oxidación del agua de estas nanopartículas de CoMnP.

Principales métodos:

  • Reacción en la fase de solución de complejos de manganeso y cobalto con trioctilofosfina.
  • Síntesis de nanopartículas de CoMnP casi monodispersas y homogéneas (aprox. 5 nm de diámetro).
  • Pruebas electroquímicas de las nanopartículas de CoMnP como tinta catalizadora.

Principales resultados:

  • Las nanopartículas de CoMnP demostraron una catálisis de oxidación de agua eficiente.
  • Logró un exceso de potencial de 0,33 V con una eficiencia Faradaic del 96%.
  • Se observó una ligera disminución de la actividad después de 500 ciclos debido al grabado P y a la oxidación superficial.

Conclusiones:

  • Los fosfuros ternales de cobalto manganeso son una nueva clase prometedora de materiales para la oxidación del agua.
  • Las nanopartículas de CoMnP ofrecen una vía potencial para el desarrollo de tecnologías eficientes y sostenibles de separación del agua.