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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
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Gliconanopartículas redox activas como transporte de electrones para la transferencia mediada de electrones con la
Andrew J Gross1,2, Xiaohong Chen1, Fabien Giroud1
1Department of Molecular Chemistry, DCM, Univ. Grenoble Alpes , CNRS, 38000 Grenoble, France.
Journal of the American Chemical Society
|November 1, 2017
Resumen
Las nanopartículas redox activas con la funcionalidad de anfitrión-invitado transportan eficientemente electrones para la bioelectrocatálisis. Este sistema bioinspirado mejora la reducción de oxígeno y la estabilidad catalítica, lo que promete avances en las células de biocombustible y los biosensores.
Área de la Ciencia:
- Nanotecnología
- La bioelectroquímica
- Biomateriales
Sus antecedentes:
- Las nanopartículas recubiertas de ciclodextrina ofrecen funcionalidad de huésped para encapsular moléculas redox hidrofóbicas en soluciones acuosas.
- Las nanopartículas redox activas pueden servir como eficientes mediadores de electrones en sistemas bioelectrocatalíticos.
Objetivo del estudio:
- Demostrar el autoensamblaje, la caracterización y la aplicación bioelectrocatalítica de las nanopartículas con recubrimiento de ciclodextrina redox-activa.
- Investigar el uso de estas nanopartículas como lanzaderas de electrones para reacciones catalizadas por enzimas.
Principales métodos:
- Autoensamblaje de nanopartículas recubiertas con ciclodextrina que encapsulan el bispireno ABTS.
- Caracterización electroquímica y espectroscópica de las nanopartículas.
- Investigación de la transferencia de electrones entre las nanopartículas y los sitios activos de la enzima (bilirrubina oxidasa).
Principales resultados:
- El ensamblaje exitoso y la caracterización de las nanopartículas redox-activas.
- Se ha demostrado el traslado de electrones a través de la transferencia intraelectrónica entre grupos de nanopartículas y sitios de cobre de la enzima.
- Se observaron densidades de corriente mejoradas para la reducción de oxígeno en comparación con los mediadores disueltos.
- Logró una mejor estabilidad catalítica durante 2 días, atribuida a la arquitectura polimérica de la nanopartícula.
Conclusiones:
- Las nanopartículas redox activas bioinspiradas son mediadores efectivos para la bioelectrocatálisis.
- El sistema de nanopartículas mejora el rendimiento catalítico y la estabilidad para la reducción de oxígeno.
- Esta tecnología es prometedora para futuras células de biocombustible y biosensores.
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