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Catalizadores de un solo átomo estabilizados por interacción de soporte metálico fuerte oxidativo para la

Boyang Liu¹, Muhan Li¹, Xiao Chen²

¹School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P.R. China.

Journal of the American Chemical Society

|April 25, 2025

Resumen

Los investigadores informan de la primera interacción oxidativa fuerte de soporte metálico (SMSI) en catalizadores de un solo átomo (SAC) para la hidroformilación mejorada. Este método aumenta la actividad catalítica y la estabilidad, ofreciendo una nueva estrategia de diseño para catalizadores heterogéneos.

Área de la Ciencia:

Catálisis
Ciencias de los materiales
Química de las superficies

Sus antecedentes:

La interacción fuerte de soporte metálico (SMSI) es clave en la catálisis heterogénea, influyendo en el rendimiento del catalizador.
Los estudios de SMSI sobre catalizadores de un solo átomo (SAC) son limitados, a pesar de que los SAC sirven de puente entre la catálisis homogénea y la heterogénea.

Objetivo del estudio:

Informar por primera vez sobre las SMSI oxidativas en los SAC.
Mejorar la actividad y la estabilidad de la hidroformilación utilizando este nuevo enfoque de SMSI.

Principales métodos:

Se utilizan soportes de dióxido de zirconio (ZrO2) para átomos individuales de Rh.
Se utiliza la calcinación en el aire para inducir la SMSI oxidativa (encapsulación).
Se utiliza la reducción de H2 para volver a exponer los átomos Rh individuales.

Principales resultados:

Se logró una frecuencia de rotación (TOF) récord de 11.097 h-1 para la hidroformilación heterogénea.
Se ha demostrado una mayor estabilidad del Rh incrustado contra la lixiviación de metales.
Observación de la encapsulación de los átomos Rh por el soporte ZrO2 a través de SMSI oxidativo.

Conclusiones:

La SMSI oxidativa es una estrategia viable para mejorar los SAC para la hidroformilación.
Este enfoque mejora significativamente la actividad catalítica y la estabilidad.
Amplía los conceptos de SMSI y proporciona una vía para diseñar catalizadores heterogéneos avanzados.

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