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Reducción fotocatalítica de baja concentración de CO2

Takuya Nakajima¹, Yusuke Tamaki¹, Kazuki Ueno¹

¹Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , 2-12-1, NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan.

Journal of the American Chemical Society

|October 6, 2016

Resumen

Un nuevo fotocatalizador molecular captura y reduce eficientemente el dióxido de carbono (CO2) a monóxido de carbono (CO). Este sistema demuestra un alto rendimiento incluso a bajas concentraciones de CO2, ofreciendo una solución prometedora para la utilización de CO2.

Área de la Ciencia:

Fotocatálisis
Química ecológica
Ciencias de los materiales

Sus antecedentes:

La reducción eficiente del dióxido de carbono (CO2) es crucial para mitigar el cambio climático.
El desarrollo de sistemas fotocatalíticos con altas capacidades de captura y reducción de CO2 sigue siendo un desafío.

Objetivo del estudio:

Desarrollar un nuevo sistema fotocatalítico molecular para la captura y conversión eficientes de CO2.
Investigar el rendimiento de un complejo dinuclear Ru (II) -Re (I) para la reducción de CO2.

Principales métodos:

Síntesis de un complejo dinuclear de Ru (II) -Re (I) como fotocatalizador.
Reducción fotocatalítica de CO2 a CO bajo diferentes concentraciones de CO2.
Análisis de la eficiencia catalítica utilizando el número de volúmenes (TON) y el rendimiento cuántico (Φ).

Principales resultados:

El fotocatalizador Ru (II) -Re (I) demostró altas capacidades de captura y reducción de CO2.
Conversión selectiva del 10% de CO2 en CO con una alta eficiencia (TONCO > 1000, ΦCO > 0,4).
Reducción efectiva del 0,5% de CO2 con una eficiencia inicial de formación de CO del 60% (TONCO > 200).

Conclusiones:

El sistema fotocatalítico desarrollado muestra un excelente rendimiento para la conversión de CO2 en CO.
La unidad Re ((I) facilita la captura de CO2 mediante la inserción en el enlace Re-O.
La unidad de fotosensibilización Ru proporciona electrones para la reducción del CO2 capturado.

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