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Glicol de etileno electrocatalítico a ácidos α-hidroxicarboxílicos de cadena larga mediante acoplamiento cruzado con

Qiujin Shi¹, Yu-Quan Zhu², Xiang Liu¹

¹Department of Chemistry, Tsinghua University, Beijing 100084, China.

Journal of the American Chemical Society

|April 8, 2025

Resumen

Este estudio demuestra el acoplamiento electrocatalítico de etilenoglicol (EG) con alcoholes para producir valiosos ácidos α-hidroxicarboxílicos (α-HCAs). Este método sostenible convierte eficientemente los residuos plásticos en productos químicos útiles como el ácido láctico.

Área de la Ciencia:

La electroquímica
Química sustentable
Catálisis

Sus antecedentes:

El etilenoglicol (EG) es una materia prima fácilmente disponible a partir del plástico y la biomasa.
El desarrollo de métodos eficientes para convertir el EG en productos químicos de valor añadido es crucial para el desarrollo sostenible.

Objetivo del estudio:

Informar sobre un método de acoplamiento electrocatalítico directo para la conversión del etilenoglicol (EG) y los alcoholes primarios en ácidos α-hidroxicarboxílicos (α-HCAs).
Investigar el mecanismo y optimizar las condiciones para producir ácido láctico (LA) a partir de EG y metanol (MeOH).

Principales métodos:

Reacción de acoplamiento electrocatalítico con un catalizador de oro (Au).
Modulación sistemática de las condiciones de catalización y reacción.
Caracterización de los productos intermedios de la reacción.

Principales resultados:

Se alcanzó una alta productividad de ácido láctico (LA) de 268,1 μmol cm−2 h−1 con una eficiencia Faradaic del 28,7%.
Generalidad demostrada para la producción de C3-C6 α-HCAs a partir de EG y varios alcoholes primarios.
Se ha convertido con éxito una botella de PET posterior al consumo en LA con una productividad de 224,5 μmol cm-2.

Conclusiones:

La estabilización de los intermedios aldehídos es clave para el acoplamiento cruzado eficiente y la formación de α-HCA.
La estrategia electrocatalítica permite la propagación de la cadena de carbono desde EG a través del acoplamiento cruzado de enlaces C-C.
Este enfoque ofrece una vía sostenible para convertir los residuos plásticos y la biomasa en productos químicos valiosos.

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