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Nanopartículas de níquel monodispersas y su catálisis en la deshidrogenación hidrolítica del amoniaco borano

Onder Metin¹, Vismadeb Mazumder, Saim Ozkar

¹Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.

Journal of the American Chemical Society

|January 19, 2010

Resumen

Las nanopartículas de níquel monodispersas catalizan eficientemente la generación de hidrógeno a partir de la hidrólisis de amoniaco y boro. Este avance apoya el amoniaco-borano como un medio viable de almacenamiento de hidrógeno para pilas de combustible.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
La catálisis es la catálisis.
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

El almacenamiento de hidrógeno es crítico para la tecnología de celdas de combustible.
El amoníaco-borano (H3NBH3) es un material de almacenamiento de hidrógeno prometedor.
Se necesitan catalizadores eficientes para la hidrólisis de amoníaco y boro.

Objetivo del estudio:

Para sintetizar las nanopartículas de níquel monodisperso.
Para evaluar su actividad catalítica en la generación de hidrógeno a partir de amoníaco-borano.
Para evaluar su potencial para aplicaciones de pilas de combustible.

Principales métodos:

Nanopartículas de níquel sintetizadas a través de la reducción de Ni (((acac) (((2) con borano tributilamina.
Oleylamina y ácido oleico utilizados como agentes tensioactivos.
La actividad catalítica probada en la hidrólisis de amoníaco y boro sin eliminación de tensioactivo.

Principales resultados:

Las nanopartículas de Ni sintetizadas en el soporte de carbono de Ketjen mostraron una alta actividad catalítica.
Se logró una frecuencia de rotación de 8,8 mol H(2) x (mol Ni) ((-1) x min(-1).
No se necesitó ningún tratamiento especial para eliminar los tensioactivos.

Conclusiones:

Las nanopartículas de níquel son catalizadores efectivos para la hidrólisis de amoníaco y boro.
Este método ofrece una ruta prometedora para la generación práctica de hidrógeno.
Apoya el desarrollo del amoniaco-borano como medio de almacenamiento de hidrógeno.

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