Ammonia borane destabilized by aluminium hydride: A mutual enhancement for hydrogen release. (12th January 2015)

• Record Type: Journal Article
• Authors: Wan, Lei; Chen, Jie; Tan, Yingbin; Gu, Qinfen; Yu, Xuebin
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 2(2015)
• Page Start: 1047
• Page End: 1053
• Publication Date: 2015-01-12
• Subjects: Hydrogen storage -- Ammonia borane -- Aluminum hydride -- Mutual enhancement; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2014.11.065
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Destabilized by aluminum hydride, the dehydrogenation properties of ammonia borane (AB) can be improved significantly, including enhanced dehydrogenation kinetics, reduced induction period and suppressed formation of volatile byproducts. Furthermore, a lowered dehydrogenation temperature was also achieved for AlH3, indicating a mutual dehydrogenation enhancement for both AB and AlH3 in this mixture. The destabilized sample, 3AB/AlH3, can totally release more than 12 wt% of high-pure hydrogen (>99 wt%) without any detectable by-products below 250 °C. Mechanism investigations indicated that the mutual dehydrogenation enhancement in the mixture is attributed to the Coulombic attraction between the hydridic H δ− in AlH3 and the protonic H δ+ in the NH3 group of AB. Graphical abstract: A novel modification strategy that destabilize AB with AlH3 is employed to achieve a mutual enhancement for hydrogen release--> 12 wt. % pure H2 released below 250 ° C for the 3AB/AlH3 sample. Highlights: Aluminum hydride was applied to improve dehydrogenation of ammonia borane. A mutual dehydrogenation enhancement for both AB and AlH3 in the 3AB/AlH3 sample. Over 12 wt% of high-pure hydrogen (>99 wt%) can be released from 3AB/AlH3 below 250 °C.