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Potasio ((I) amidotrihidroborato: estructura y liberación de hidrógeno
Himashinie V K Diyabalanage1, Tessui Nakagawa, Roshan P Shrestha
1Materials Physics and Applications Division, Los Alamos National Laboratory, Mail Stop J514, Los Alamos, New Mexico 87545, USA.
Journal of the American Chemical Society
|August 7, 2010
Resumen
El amidotrihidroborato de potasio (KNH2BH3) es un nuevo material de almacenamiento de hidrógeno. Libera un 6,5 por ciento de peso de hidrógeno a partir de 80 ° C, lo que difiere significativamente de los análogos de litio y sodio.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Ingeniería Química Ingeniería Química.
Sus antecedentes:
- Los amidotrihidroboratos de metales alcalinos se están investigando para aplicaciones de almacenamiento de hidrógeno.
- Los materiales existentes como los compuestos de litio y sodio tienen perfiles específicos de liberación de hidrógeno.
- Se buscan nuevos motivos estructurales para mejorar las características de almacenamiento de hidrógeno.
Objetivo del estudio:
- Para sintetizar y caracterizar el amidotrihidroborato de potasio (KNH2BH3).
- Para investigar las propiedades de liberación de hidrógeno de KNH2BH3.3.
- Para comparar KNH2BH3 con otros amidotrihidroboratos de metales alcalinos para el almacenamiento de hidrógeno.
Principales métodos:
- Síntesis química del KNH2BH3.3.
- Difracción de rayos X para el análisis estructural.
- Análisis termogravimétrico (TGA) para estudiar la liberación de hidrógeno.
Principales resultados:
- Síntesis exitosa y determinación estructural de KNH2BH3.3.
- Observación de una evolución de hidrógeno del 6,5 wt% comenzando a 80°C.
- Distinto perfil de liberación de hidrógeno en comparación con LiNH2BH3 y NaNH2BH3.3.
Conclusiones:
- KNH2BH3 presenta un nuevo tipo estructural dentro de los amidotrihidroboratos de metales alcalinos.
- El material exhibe prometedoras capacidades de liberación de hidrógeno a baja temperatura.
- Una mayor investigación sobre KNH2BH3 podría avanzar en las tecnologías de almacenamiento de hidrógeno.
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