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Reducción electroquímica de CO2 a hidrocarburos en un catalizador de Cu molecular heterogéneo en solución acuosa

Zhe Weng^1,2, Jianbing Jiang^1,2, Yueshen Wu^1,2

¹Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States.

Journal of the American Chemical Society

|June 17, 2016

Resumen

Este estudio introduce un nuevo catalizador de cobre-porfirina para convertir eficientemente el dióxido de carbono (CO2) en hidrocarburos valiosos. Este electrocatalizador molecular demuestra una alta actividad y selectividad, ofreciendo una solución prometedora para la reducción de CO2.

Área de la Ciencia:

Catálisis
La electroquímica
Ciencias de los materiales

Sus antecedentes:

El desarrollo de catalizadores eficientes para la reducción electroquímica de dióxido de carbono es crucial para convertir las emisiones en combustibles.
El logro de la reducción selectiva a los hidrocarburos sigue siendo un desafío importante.

Objetivo del estudio:

Informar sobre un nuevo catalizador molecular heterogéneo para la electrorreducción selectiva de CO2 a hidrocarburos.
Investigar la actividad catalítica y la selectividad de un complejo de cobre-porfirina.

Principales métodos:

Síntesis y caracterización de un complejo de cobre ((II) -5,10,15,20-tetráquido ((2,6-dihidroxifenilo) porfirina.
Evaluación electroquímica del catalizador para la reducción de CO2 en medios acuosos.
Análisis de la distribución del producto (metano, etileno) y métricas de rendimiento catalítico.

Principales resultados:

El complejo cobre-porfirina demostró una alta actividad y selectividad para la electroreducción de CO2 a hidrocarburos.
Se obtienen densidades parciales de corriente de 13,2 mA cm(-2) para el metano y de 8,4 mA cm(-2) para el etileno a -0,976 V frente a RHE.
Se han alcanzado frecuencias de rotación de 4,3 s para el metano y de 1,8 s para el etileno, que representan las más altas registradas para los electrocatalizadores moleculares.

Conclusiones:

El catalizador de cobre-porfirina desarrollado ofrece un rendimiento sin precedentes para la conversión de CO2 en hidrocarburos.
La eficacia del catalizador se atribuye a los grupos hidroxilo integrados y al sitio activo de cobre.
Este trabajo presenta un avance significativo en la electrocatálisis molecular para la producción sostenible de combustible.

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