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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
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Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
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Catalizador de hidrogenación de cobre soportado en sílice, reciclable y eficiente

Anjali Katkar1, Krishnamay Pal2, Ajit Garade1

  • 1Evonik Catalysts India Pvt. Ltd., Dombivli, India.

Communications chemistry
|December 30, 2025
PubMed
Resumen

Un nuevo catalizador de silicato de cobre ofrece una alternativa rentable y sostenible para las reacciones de hidrogenación. Este material abundante logra altos rendimientos en la conversión de nitrornos en condiciones suaves, reemplazando los metales nobles caros.

Palabras clave:
hidrogenacióncatalizador de cobresilicato de cobrenitrornosquímica verdemateriales sostenibles

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Área de la Ciencia:

  • Catálisis
  • Ciencia de materiales
  • Química verde

Sus antecedentes:

  • Las reacciones de hidrogenación a menudo dependen de catalizadores de metales nobles caros y escasos.
  • El desarrollo de catalizadores sostenibles a partir de materiales abundantes en la tierra para condiciones de reacción suaves es un desafío importante.

Objetivo del estudio:

  • Preparar y evaluar un nuevo catalizador de silicato de cobre para la hidrogenación.
  • Demostrar una alternativa eficaz y sostenible a los catalizadores de metales nobles en la reducción de nitrornos.

Principales métodos:

  • Método de evaporación de amoníaco para la preparación del catalizador.
  • Caracterización mediante análisis estructurales y de superficie.
  • Prueba del rendimiento del catalizador en la conversión de nitrornos a anilina en condiciones suaves.

Principales resultados:

  • El catalizador de silicato de cobre exhibió un rendimiento excepcional, logrando rendimientos >99%.
  • Se mantuvieron alta actividad y estabilidad en condiciones de reacción suaves.
  • Se identificaron especies de cobre bien dispersas, lo que facilitó la activación del hidrógeno y la conversión del sustrato.

Conclusiones:

  • Los catalizadores de silicato de cobre proporcionan una alternativa rentable y sostenible a los metales nobles para la hidrogenación.
  • El catalizador demuestra una robusta reciclabilidad y viabilidad práctica para aplicaciones industriales.
  • Este trabajo destaca el potencial de los sistemas a base de cobre en procesos de hidrogenación eficientes y escalables.