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La catálisis sinérgica en tándem de CuCo y el enlace de hidrógeno inducido por el dopaje de F permiten una reducción

Pengfei Liu¹, Huilin Zhao¹, Xuetao Cheng¹

¹Inner Mongolia Key Laboratory of Rare Earth Catalysis, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China.

Journal of colloid and interface science

|August 30, 2025

Resumen

Este estudio introduce un nuevo catalizador bimetálico de Cu/Co dopado con F para la reducción electroquímica de nitratos (eNO3RR), logrando un alto rendimiento y estabilidad de amoníaco. El dopaje de flúor mejora la disociación del agua, aumentando el rendimiento catalítico para la síntesis sostenible de amoníaco.

Área de la Ciencia:

La electroquímica
Catálisis
Química sustentable

Sus antecedentes:

La reducción electroquímica de nitratos (eNO3RR) ofrece una vía sostenible para la síntesis de amoníaco y la mitigación de la contaminación por nitratos.
Los desafíos en los medios alcalinos incluyen intermedios complejos y alta dependencia de hidrógeno (*H), lo que limita la eficiencia de generación de amoníaco (NH3).

Objetivo del estudio:

Desarrollar un catalizador en tándem altamente eficiente y estable para eNO3RR.
Investigar el papel del dopaje con flúor en el aumento de la actividad catalítica.

Principales métodos:

Fabricación de un catalizador en tándem de Cu/Co cubierto de carbono dopado con F (Cu/Co@FC).
Evaluación electroquímica del catalizador para eNO3RR en medios alcalinos.
Caracterización in situ y cálculos teóricos para elucidar los mecanismos de reacción.

Principales resultados:

Cu/Co@FC logró una eficiencia Faradaic del 96.6% y un rendimiento de amoníaco de 17.779.2 μg h-1 mg-1 a -0.95 V.
El catalizador demostró una excelente estabilidad durante 60 horas de electrólisis continua a una alta densidad de corriente.
El dopaje F facilitó la disociación del agua a través de enlaces de hidrógeno O-HF, proporcionando abundante * H para la hidrogenación.

Conclusiones:

El efecto sinérgico de los sitios Cu y Co, junto con el dopaje F, mejora significativamente el rendimiento de eNO3RR.
El catalizador desarrollado presenta una solución prometedora para la producción sostenible de amoníaco y la remediación de nitratos.

Palabras clave:

Sitios bimetálicos Reducción electroquímica de nitratos F el dopaje Interacción de enlace de hidrógeno Catálisis en tándem

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