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Reducción catalítica del nitrógeno mediante hidroboración

Shun Suginome¹, Atsushi Okochi¹, Taiji Nakamura²

¹Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo113-8656, Japan.

Journal of the American Chemical Society

|July 17, 2025

Resumen

Los investigadores han desarrollado un nuevo método catalítico para la fijación del nitrógeno en condiciones suaves. Este proceso utiliza catalizadores de nitruro de molibdeno para convertir el nitrógeno (N2) en berilaminas, ofreciendo una alternativa prometedora al proceso de Haber-Bosch, que requiere mucha energía.

Área de la Ciencia:

Química inorgánica
Catálisis
Química sustentable

Sus antecedentes:

El proceso Haber-Bosch, esencial para la producción de amoníaco, requiere temperaturas y presiones extremas.
El desarrollo de métodos alternativos y más suaves de fijación del nitrógeno es crucial para la sostenibilidad.
La conversión catalítica del nitrógeno (N2) utilizando reductores más suaves sigue siendo un desafío importante.

Objetivo del estudio:

Informar sobre un nuevo sistema catalítico para la reducción del nitrógeno (N2) en condiciones suaves.
Investigar la vía de hidroboración para la conversión de N2.
Promover el desarrollo de tecnologías eficientes de fijación del nitrógeno.

Principales métodos:

Reducción catalítica del N2 utilizando el catecolborano como reductor.
Utilizando complejos de nitruro de molibdeno con ligandos de pinza tipo PCP como catalizadores.
Conducir la reacción a 60 °C y a una presión de 1 atm de N2.

Principales resultados:

Se ha conseguido la conversión catalítica de N2 en berilaminas con un rendimiento de hasta 32 equivalentes.
La reacción procede a través de la hidroboración sucesiva, la desproporcionamiento del hidruro y la escisión del enlace N-N.
Se ha demostrado la regeneración del catalizador activo de nitruro de molibdeno.

Conclusiones:

La reducción catalítica de N2 en condiciones leves mediante hidroboración es factible.
Este método ofrece un avance significativo con respecto al proceso Haber-Bosch.
El sistema desarrollado representa un paso hacia sistemas ideales de fijación de nitrógeno.

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