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Interconversión reversible y selectiva de hidrógeno y dióxido de carbono en formato por un imitador de formato

Katarzyna P Sokol¹, William E Robinson¹, Ana R Oliveira²

¹Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , U.K.

Journal of the American Chemical Society

|October 23, 2019

Resumen

Los investigadores crearon sistemas semiartificiales de formato hidrogenliasa (FHL) utilizando enzimas en materiales conductores. Estos sistemas convierten eficientemente el formato en hidrógeno y CO2, ofreciendo una plantilla para catalizadores sintéticos.

Área de la Ciencia:

Biocatálisis
La bioelectroquímica
Biología sintética

Sus antecedentes:

El complejo biológico de formato hidrogenliasa (FHL) en E. coli facilita la fermentación ácida mixta.
Los enlaces FHL al formato deshidrogenasa (FDH) y a la hidrogenasa (H2asa) para la producción de H2 y CO2 a partir del formato.
La comprensión del mecanismo de FHL es crucial para el desarrollo de sistemas biocatalíticos eficientes.

Objetivo del estudio:

Desarrollar nuevos sistemas FHL semiartificiales para la conversión reversible de formato en hidrógeno.
Investigar la eficiencia de la inmovilización de enzimas en materiales conductores.
Establecer una plantilla para el diseño de catalizadores sintéticos avanzados.

Principales métodos:

Construcción de sistemas FHL electroquímicos y coloidales semiartificiales.
Inmovilización de FDH y H2asa sobre el óxido de indio y estaño (ITO) como un relé de electrones.
Caracterización de la conversión reversible del formato en H2 y CO2 en condiciones ambientales.

Principales resultados:

Se ha demostrado la eficacia del cableado de FDH y H2asa en sistemas artificiales.
Se logra la conversión reversible del formato en H2 y CO2 a temperatura y presión ambiente.
Sistemas híbridos desarrollados que superan el complejo FHL nativo en almacenamiento y liberación de H2.

Conclusiones:

Los sistemas FHL semiartificiales ofrecen una plataforma prometedora para la producción y el almacenamiento de hidrógeno bajo demanda.
La inmovilización enzimática en materiales conductores mejora la eficiencia catalítica y la reversibilidad.
Estos hallazgos allanan el camino para el diseño de catalizadores sintéticos de próxima generación para aplicaciones energéticas.

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