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Producción escalable de membranas de carbono decoradas de cobre de un solo átomo eficientes para la electrorreducción

Hengpan Yang¹, Yu Wu², Guodong Li²

¹Shenzhen Key Laboratory for Functional Polymer, College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen , Guangdong 518060 , China.

Journal of the American Chemical Society

|July 27, 2019

Resumen

Los investigadores desarrollaron nuevos catalizadores de un solo átomo de cobre en nanofibras de carbono para una reducción electrocatalítica eficiente de dióxido de carbono (CO2RR). Este catalizador produce metanol de alto valor con una notable estabilidad, ofreciendo una solución prometedora para la conversión de CO2.

Área de la Ciencia:

Ciencias de los materiales
La electroquímica
Catálisis

Sus antecedentes:

La reducción electrocatalítica del dióxido de carbono (CO2RR) es crucial para mitigar los problemas ambientales.
El desarrollo de catalizadores eficientes para convertir el CO2 en productos valiosos como el metanol sigue siendo un desafío importante.

Objetivo del estudio:

Para sintetizar y caracterizar átomos aislados de cobre decorados en nanofibras de carbono con agujero (CuSA/TCNF).
Evaluar el rendimiento de las CuSA/TCNF como cátodo autoportante para la CO2RR.
Investigar el mecanismo de producción de metanol mediante cálculos DFT.

Principales métodos:

Estrategia de síntesis fácil para la producción a gran escala de CuSAs/TCNFs.
Pruebas electrocatalíticas de la membrana CuSAs/TCNFs como cátodo para la detección de CO2RR en fase líquida.
Cálculos de la Teoría Funcional de Densidad (DFT) para comprender el mecanismo catalítico.

Principales resultados:

Los CuSA/TCNF exhibieron excelentes propiedades mecánicas y sirvieron directamente como cátodo.
Se generó metanol casi puro con una eficiencia Faradaic del 44%.
Se obtiene una densidad de corriente parcial de -93 mA cm-2 para los productos C1 con más de 50 horas de estabilidad.
Los cálculos de DFT indicaron que los átomos individuales de Cu favorecen la reducción de los intermedios de *CO al metanol.

Conclusiones:

La membrana CuSAs/TCNFs es un catalizador altamente eficiente y estable para el CO2RR, produciendo metanol.
La estructura de agujero y los átomos aislados son clave para el rendimiento del catalizador.
Este trabajo proporciona información para el diseño de catalizadores avanzados de un solo átomo para aplicaciones electrocatalíticas.

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