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Un catalizador de rutenio robusto, estable en el aire y reutilizable para la deshidrogenación del amoniaco borano

Brian L Conley¹, Denver Guess, Travis J Williams

¹Department of Chemistry and Loker Hydrocarbon Institute, University of Southern California, 837 Bloom Walk, Los Angeles, California 90089-1661, USA.

Journal of the American Chemical Society

|August 11, 2011

Resumen

Un nuevo catalizador de rutenio deshidrogena eficientemente el amoniaco borano (AB) bajo el aire, liberando hidrógeno significativo. Este robusto catalizador demuestra estabilidad en múltiples ciclos, incluso en presencia de agua.

Área de la Ciencia:

La catálisis de la catálisis.
Ciencia de los materiales Ciencia de los materiales.
Ingeniería Química Ingeniería Química.

Sus antecedentes:

El amoniaco borano (AB) es un material de almacenamiento de hidrógeno prometedor.
La deshidrogenación eficiente de AB es crucial para las aplicaciones de combustible de hidrógeno.
Los catalizadores homogéneos ofrecen una alta actividad y selectividad.

Objetivo del estudio:

Desarrollar un catalizador de rutenio homogéneo eficiente para la deshidrogenación del amoniaco borano.
Para evaluar el rendimiento del catalizador bajo el aire y en presencia de agua.
Para evaluar la robustez y reutilización del catalizador.

Principales métodos:

Catálisis homogénea utilizando un complejo de rutenio.
Deshidrogenación de las suspensiones de amoniaco borano concentrado.
Cromatografía de gases para cuantificar la evolución del hidrógeno.
Pruebas de actividad catalítica en múltiples ciclos.

Principales resultados:

El catalizador de rutenio libera eficientemente más de 2 equivalentes de H2 de amoniaco borano.
Se obtuvo hasta un 4,6 por ciento de peso de H2 de las suspensiones AB concentradas.
El catalizador mantuvo una alta actividad durante varios ciclos de deshidrogenación.
El rendimiento del catalizador no se vio afectado por la exposición al aire y al agua.

Conclusiones:

Se ha desarrollado un catalizador de rutenio homogéneo eficiente y robusto para la deshidrogenación del amoniaco borano.
El catalizador muestra potencial para aplicaciones prácticas de generación de hidrógeno.
La estabilidad del catalizador en condiciones ambientales es una ventaja significativa.

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