Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Radical Oxidation of Allylic and Benzylic Alcohols01:21

Radical Oxidation of Allylic and Benzylic Alcohols

2.2K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.2K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

15.6K
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.
15.6K
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

89
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
89
Weak Acid Solutions04:02

Weak Acid Solutions

31.3K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
31.3K
Corrosion02:49

Corrosion

21.8K
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
21.8K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

58.8K
Oxidation–Reduction Reactions
58.8K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Enantiopurity-Controlled Magnetism in a Two-Dimensional Organic-Inorganic Material.

Journal of the American Chemical Society·2026
Same author

Revisiting the origin of electrochemical activity in the topological semimetal PtGa.

Chemical science·2026
Same author

Combining Ag(II) and Ag(I) Reactivity Enables Electrophotochemical Acyl Fluoride Installation on (Hetero)Arenes.

Journal of the American Chemical Society·2026
Same author

Visible-light-induced chlorine photoelimination from acridinium-phosphine gold(iii) complexes.

Chemical science·2026
Same author

Correction to "Near-Unity Triplet Quantum Yield in a Molecular Cofacial H-Dimer".

Journal of the American Chemical Society·2026
Same author

Structured Electrodes Induce Local pH as a Primary Determinant of CO<sub>2</sub> Reduction Selectivity.

Journal of the American Chemical Society·2026

Video Experimental Relacionado

Updated: May 1, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

7.1K

Un catalizador funcionalmente estable de la evolución del oxido de manganeso oxígeno en el ácido ácido.

Michael Huynh1, D Kwabena Bediako, Daniel G Nocera

  • 1Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States.

Journal of the American Chemical Society
|March 28, 2014
PubMed
Resumen
Este resumen es generado por máquina.

El óxido de manganeso (MnOx) actúa como un catalizador de reacción de evolución de oxígeno (OER) estable a través de la autocuración. Este proceso, impulsado por la redeposición de MnOx, permite que los catalizadores de metales no nobles funcionen en condiciones ácidas.

Más Videos Relacionados

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
09:02

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate

Published on: June 18, 2020

12.9K
Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

3.9K

Videos de Experimentos Relacionados

Last Updated: May 1, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

7.1K
Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
09:02

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate

Published on: June 18, 2020

12.9K
Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

3.9K

Área de la Ciencia:

  • La electroquímica es electroquímica.
  • Ciencia de los materiales Ciencia de los materiales.
  • La catálisis de la catálisis.

Sus antecedentes:

  • Los metales de primera fila son cruciales para desarrollar catalizadores de reacción de evolución de oxígeno (OER) rentables.
  • El óxido de manganeso (MnOx) es un prometedor candidato catalizador de metales no nobles para OER.

Objetivo del estudio:

  • Para caracterizar exhaustivamente la electroquímica de MnOx a través de un amplio rango de pH.
  • Para aclarar el mecanismo OER y las propiedades de autocuración de MnOx.
  • Establecer las condiciones para una catálisis estable de MnOx OER, incluso en medios ácidos.

Principales métodos:

  • Caracterización electroquímica del MnOx sobre el pH ácido, neutro y alcalino.
  • Análisis cinético que incluye pendientes Tafel y la dependencia de la concentración de protones.
  • Investigación de electrodeposición y mecanismos de disolución de MnOx.

Principales resultados:

  • MnOx exhibe estabilidad funcional como un catalizador OER debido a la auto-curación a través de la redeposición.
  • Se identificaron dos mecanismos OER que compiten entre sí: el PCET (alcalino) y la desproporción del Mn3+ (ácido).
  • El análisis cinético reveló leyes de velocidad distintas para la electrodeposición de OER y MnOx a través del pH.

Conclusiones:

  • La autocuración a través de la redeposición de MnOx compensa la disolución, asegurando la estabilidad del catalizador.
  • La interacción entre la cinética OER y la cinética de deposición define las regiones de estabilidad de MnOx.
  • Los óxidos de metales no nobles como el MnOx pueden funcionar como catalizadores estables de OER en medios ácidos aprovechando la autocuración.