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Selectiva y eficiente reducción fotocatalítica de CO2 a CO utilizando luz visible y un catalizador homogéneo a base
Julien Bonin1, Marc Robert, Mathilde Routier
1Université Paris Diderot , Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France.
Journal of the American Chemical Society
|November 15, 2014
Resumen
Los investigadores convirtieron el dióxido de carbono (CO2) en monóxido de carbono (CO) utilizando la luz solar y un catalizador de hierro abundante en la tierra. Este proceso sostenible muestra una alta eficiencia y estabilidad a largo plazo para las soluciones energéticas y climáticas.
Área de la Ciencia:
- La catálisis de la catálisis.
- La fotoquímica es la fotoquímica.
- Química verde es la química verde.
Sus antecedentes:
- Abordar el cambio climático y las demandas de energía requiere tecnologías eficientes de conversión de CO2.
- La catálisis impulsada por la luz solar ofrece una vía sostenible para la síntesis química.
- Se buscan complejos metálicos abundantes en la Tierra para aplicaciones catalíticas rentables.
Objetivo del estudio:
- Desarrollar un método selectivo y eficiente para convertir el CO2 en compuestos valiosos utilizando la luz visible.
- Investigar la actividad catalítica y la estabilidad de un complejo a base de hierro para la reducción de CO2.
- Proponer un mecanismo para la conversión fotocatalítica de CO2 observada.
Principales métodos:
- Utilizó un fotosensibilizador orgánico barato para la excitación de luz visible (λ > 400 nm).
- Empleado un hierro sustituido (((0) tetrafenilporfirina como catalizador homogéneo.
- Monitoreo de la actividad catalítica y la formación de productos durante largos períodos (t > 50 h).
Principales resultados:
- Se ha logrado la generación selectiva de monóxido de carbono (CO) a partir del CO2.
- Demostró altos números de rotación, lo que indica una catálisis eficiente.
- Se observó una actividad catalítica sostenida sin desactivación del catalizador o fotosensibilizador durante 50 horas.
Conclusiones:
- El sistema desarrollado convierte eficientemente el CO2 en CO utilizando la luz solar y un catalizador de hierro abundante en la tierra.
- El catalizador y el fotosensibilizador exhiben una excelente estabilidad, crucial para aplicaciones prácticas.
- Los hallazgos presentan un enfoque prometedor para la utilización sostenible de CO2 en los esfuerzos de mitigación de la energía y el clima.
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