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Estrategia de emisión térmica para sintetizar sitios de metal Pt dispersos atómicamente a partir de metal Pt a granel

Yunteng Qu¹, Bingxu Chen², Zhijun Li¹

¹School of Chemistry and Materials Science, Hefei National Laboratory for Physical Sciences at the Microscale , University of Science and Technology of China , Hefei 230026 , China.

Journal of the American Chemical Society

|March 6, 2019

Resumen

Los investigadores desarrollaron un método de emisión térmica simple para crear catalizadores de un solo átomo de platino (SAC) en grafeno defectuoso. Este enfoque rentable produce catalizadores altamente activos para la evolución del hidrógeno y la oxidación del organosilano.

Área de la Ciencia:

Ciencias de los materiales
Catálisis
Nanotecnología

Sus antecedentes:

El desarrollo de catalizadores eficientes de un solo átomo (SAC) es crucial para las reacciones químicas avanzadas.
Los métodos de síntesis existentes para los SAC pueden ser complejos y costosos.

Objetivo del estudio:

Establecer un método fácil y rentable para la síntesis de catalizadores de sitios de un solo átomo bien definidos.
Para explorar la actividad catalítica de los catalizadores de un solo átomo de platino (Pt SAs/DG) preparados como tal.

Principales métodos:

Utilizando una técnica de emisión térmica con platino a granel como el precursor.
Utilizando la pirólisis de dicandiamida para generar amoníaco para la coordinación del platino.
El anclaje de complejos volátiles de platino y amoníaco en superficies defectuosas de grafeno.

Principales resultados:

Se ha sintetizado con éxito platino dispersado atómicamente en grafeno defectuoso (Pt SAs/DG).
Se ha demostrado una alta actividad catalítica para la reacción electroquímica de evolución del hidrógeno.
Mostró una excelente selectividad en la oxidación de varios organosilanos.

Conclusiones:

La estrategia de emisiones térmicas ofrece una vía simplificada y económica para los SAC.
Esta plataforma versátil es aplicable a otros átomos de un solo metal como el oro y el paladio.
Los catalizadores Pt SAs/DG desarrollados muestran un potencial significativo para aplicaciones industriales.

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