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Hidrogenación altamente selectiva de CO2 a etanol a través de un catalizador de un solo átomo diseñado bifuncional

Xue Ye^1,2, Chongya Yang^1,2, Xiaoli Pan¹

¹CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.

Journal of the American Chemical Society

|October 27, 2020

Resumen

Un nuevo catalizador de un solo átomo convierte eficientemente el dióxido de carbono (CO2) en etanol con una selectividad superior al 99%. Este catalizador bifuncional integra el iridio y el óxido de indio, ofreciendo un nuevo enfoque para producir productos químicos valiosos a partir de CO2.

Área de la Ciencia:

Catálisis
Ciencias de los materiales
Ingeniería Química

Sus antecedentes:

La hidrogenación de CO2 es crucial para producir productos valiosos de C2+.
El logro de una alta selectividad para productos específicos como el etanol sigue siendo un desafío importante.

Objetivo del estudio:

Diseñar y sintetizar un catalizador bifuncional de un solo átomo para la hidrogenación selectiva de CO2.
Investigar el mecanismo catalítico para la producción de etanol de alto rendimiento.

Principales métodos:

Diseño de un catalizador monoatómico mediante el anclaje de iridio monoatómico (Ir) en un soporte de óxido de indio (In2O3).
Experimentos de hidrogenación de CO2 en fase líquida.
Técnicas avanzadas de caracterización para elucidar el mecanismo catalítico.

Principales resultados:

El catalizador de un solo átomo Ir1-In2O3 logró una selectividad superior al 99% para la producción de etanol.
Se registró una excelente frecuencia de rotación inicial de 481 h-1.
La caracterización reveló un par ácido-base de Lewis formado por vacantes de Ir y oxígeno, facilitando la activación de CO2 y la formación de enlaces C-C.

Conclusiones:

El catalizador monoatómico bifuncional diseñado convierte efectivamente el CO2 en etanol.
La utilización sinérgica de sitios de un solo átomo e interacciones de sustrato ofrece una nueva estrategia para el diseño de catalizadores en catálisis compleja.

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