Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7717017 | International Journal of Hydrogen Energy | 2015 | 8 Pages |
Abstract
Magnesium borohydrideâethylenediamine composites (Mg(BH4)2ânEDA, n = 2, 3, 4), a new type of hydrogen storage material, were synthesized by ball milling magnesium borohydride and ethylenediamine (EDA). In particular, Mg(BH4)2â3EDA and Mg(BH4)2â4EDA can be well defined by a orthorhombic Pbca cell and a triclinic P1 cell, respectively. Hydrogen releasing from the Mg(BH4)2ânEDA composites was observed at elevated temperatures. Detailed dehydrogenation properties and mechanism of Mg(BH4)2-2EDA composite in which there are equivalent Hδ+(N) and Hδâ(B) were systematically investigated. Ca. 8 wt% hydrogen can be evolved from Mg(BH4)2-2EDA in one step upon holding it at 260 °C for 12 h. Mechanistic studies using phased dehydrogenation and isotopic labelling experiments show that hydrogen was released via the establishment of -NBN- bond as well as the combination of Hδ+ (N) and Hδâ (B).
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Juner Chen, Yong Shen Chua, Hui Wu, Zhitao Xiong, Teng He, Wei Zhou, Xiaohua Ju, Minghui Yang, Guotao Wu, Ping Chen,