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Aniones de marco de nitrógeno estabilizados en el sistema Ga-N

Hang Zhai^1,2, Rui Xu¹, Jianhong Dai²

¹State Key Laboratory of Superhard Materials, International Center for Computational Method and Software, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, China.

Journal of the American Chemical Society

|November 17, 2022

Resumen

Los investigadores exploraron compuestos de galio-nitrógeno (Ga-N) bajo presión, descubriendo nuevos materiales ricos en nitrógeno como GaN15, GaN10 y GaN5. Estos compuestos son materiales prometedores de alta densidad de energía sintetizados a presiones más bajas que el nitrógeno puro.

Área de la Ciencia:

Ciencias de los materiales
Química del estado sólido
Química computacional

Sus antecedentes:

Los compuestos ricos en nitrógeno son de interés por su diversidad de enlaces y potencial como materiales de alta densidad energética.
La exploración de nuevas composiciones en sistemas comprimidos es clave para descubrir nuevos materiales.

Objetivo del estudio:

Investigar el sistema Ga-N bajo alta presión para identificar nuevos compuestos ricos en nitrógeno.
Evaluar el potencial de estos compuestos como materiales de alta densidad energética.

Principales métodos:

Primeros principios de búsqueda estructural (computacional).
Síntesis experimental con una célula de yunque de diamante calentada con láser.
Análisis de estabilidad termodinámica.
Evaluación de la energía de descomposición.

Principales resultados:

Se identificaron tres estequiometrías de Ga-N termodinámicamente estables: GaN15, GaN10 y GaN5.
Estos compuestos exhiben topologías de marco de nitrógeno polimérico versátiles.
Las presiones de síntesis para GaN10 y GaN5 son más bajas que para el nitrógeno sólido puro.
GaN10 y GaN5 se identifican como materiales prometedores de alta densidad energética.

Conclusiones:

Se pueden sintetizar nuevos compuestos Ga-N ricos en nitrógeno a presiones accesibles.
Estos materiales son prometedores para aplicaciones de alta densidad energética.
Los hallazgos avanzan en el diseño de materiales ricos en nitrógeno y en la química del nitrógeno en condiciones extremas.

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