|Rapidly Releasing over 9 wt % of H-2 from NH3BH3-Mg or NH3BH3-MgH2 Composites around 85 degrees C|
|Luo, JH; Kang, XD; Chen, CG; Song, JF; Luo, DL; Wang, P; Luo, JH (reprint author), China Acad Engn Phys, Inst Mat, Jiangyou 621908, Sichuan, Peoples R China.; Wang, P (reprint author), South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.
|Source Publication||JOURNAL OF PHYSICAL CHEMISTRY C
|Abstract||It is ideal that the hydrogen storage materials for vehicular applications can desorb substantial amounts of hydrogen below 85 degrees C, the operating temperature of polymer electrolyte membrane (PEM) fuel cells. Ammonia borane (NH3BH3, AB for short), because of its intriguingly high hydrogen density (i.e., 19.6 wt %) and moderate thermal stability, is widely regarded as a promising on-board hydrogen storage medium. However, at this temperature, both its dehydrogenation kinetics and deliverable H-capacity are far from meeting the requirements for practical applications. Here, we report that the Mg- or MgH2-modified AB can deliver over 9 wt % of H-2 within 1.5 h at approximately 85 degrees C. Such pronounced dehydrogenation properties are found to be enabled by the combination of three factors, including partial phase transition of normal AB to its mobile phase AB* in the starting material, adequate sample thermal conductivity, and sufficiently intensive external energy input. A further mechanistic study indicates that the dehydrogenation of the AB-Mg or AB-MgH2 sample should likely involve a three-step mechanism, with the formation of a metastable or even unstable magnesium amidoborane phase being a central event.|
; chen, changan
; song, jiangfeng
; luo, deli] china acad engn phys, inst mat, jiangyou 621908, sichuan, peoples r china
; [wang, ping] south china univ technol, key lab adv energy storage mat guangdong prov, sch mat sci & engn, guangzhou 510641, guangdong, peoples r china
; [kang, xiangdong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
; [luo, junhong] sichuan juneng nucl technol engn co ltd, jiangyou 621700, sichuan, peoples r china
|Subject Area||Chemistry, Physical
; Nanoscience & Nanotechnology
; Materials Science, Multidisciplinary
|Funding Organization||Sichuan Youth Science & Technology Foundation [2014JQ0060]; National Outstanding Youth Science Foundation of China 
|Corresponding Author||Luo, JH (reprint author), China Acad Engn Phys, Inst Mat, Jiangyou 621908, Sichuan, Peoples R China.; Wang, P (reprint author), South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.|
Luo, JH,Kang, XD,Chen, CG,et al. Rapidly Releasing over 9 wt % of H-2 from NH3BH3-Mg or NH3BH3-MgH2 Composites around 85 degrees C[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2016,120(33):18386-18393.
Luo, JH.,Kang, XD.,Chen, CG.,Song, JF.,Luo, DL.,...&Wang, P .(2016).Rapidly Releasing over 9 wt % of H-2 from NH3BH3-Mg or NH3BH3-MgH2 Composites around 85 degrees C.JOURNAL OF PHYSICAL CHEMISTRY C,120(33),18386-18393.
Luo, JH,et al."Rapidly Releasing over 9 wt % of H-2 from NH3BH3-Mg or NH3BH3-MgH2 Composites around 85 degrees C".JOURNAL OF PHYSICAL CHEMISTRY C 120.33(2016):18386-18393.
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