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Catalizador de Ru integrado en la función para la reducción fotoquímica de CO2

Sze Koon Lee^1,2, Mio Kondo^1,2,3,4, Masaya Okamura¹

¹Department of Life and Coordination-Complex Molecular Science , Institute for Molecular Science (IMS) , 5-1 Higashiyama, Myodaiji , Okazaki , Aichi 444-8787 , Japan.

Journal of the American Chemical Society

|November 27, 2018

Resumen

Este resumen es generado por máquina.

Los investigadores desarrollaron un nuevo complejo de rutenio (Ru) para la reducción de dióxido de carbono (CO2) impulsado por la luz visible, que actúa como un fotosensibilizador y catalizador. Este avance ofrece una conversión eficiente de CO2 para aplicaciones de fotosíntesis artificial.

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Área de la Ciencia:

Fotocatálisis
Fotosíntesis artificial
Química ecológica

Sus antecedentes:

La reducción catalítica del dióxido de carbono (CO2) impulsada por la luz visible es crucial para la fotosíntesis artificial.
El desarrollo de fotocatalizadores eficientes es clave para avanzar en soluciones energéticas sostenibles.

Objetivo del estudio:

Demostrar el primer complejo de rutenio (Ru) capaz de actuar como fotosensibilizador y catalizador para la reducción de CO2.
Para lograr una conversión eficiente y selectiva de CO2 utilizando la luz visible.

Principales métodos:

Utilizó un nuevo complejo Ru como un fotosensibilizador y catalizador de doble función.
Reacciones de reducción de CO2 bajo irradiación de luz visible.
Basicidad variada del medio de reacción para controlar la selectividad del producto.

Principales resultados:

El complejo Ru exhibió una alta actividad para la evolución del monóxido de carbono (CO) con un número de rotación (TON) de 353 durante 24 horas y una frecuencia de rotación (TOF) de 14,7 h−1.
Se ha logrado una excelente selectividad del producto (97%) para la evolución del CO.
Se ha demostrado la formación selectiva de CO o ácido fórmico (HCOOH) mediante el ajuste de la basicidad del medio.

Conclusiones:

El complejo de Ru desarrollado es un fotocatalizador integrado de función altamente eficaz para la reducción de CO2 impulsada por la luz visible.
Este trabajo abre nuevas posibilidades para la catálisis fotorredóxica utilizando sistemas basados en Ru.
El control selectivo de la formación de productos mediante medios de reacción ofrece vías de conversión de CO2 ajustables.