Hydrogen desorption mechanism in MgH2-Nb nanocomposites -: art. no. 052103

被引：143

作者：

Pelletier, JF ^{[1
]}

Huot, J

Sutton, M

Schulz, R

Sandy, AR

Lurio, LB

Mochrie, SGJ

机构：

[1] McGill Univ, Ctr Phys Mat, Montreal, PQ H3A 2T8, Canada

[2] Inst Rech Hydro Quebec, Varennes, PQ J3X 1S1, Canada

[3] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.63.052103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In situ time-resolved x-ray scattering measurements of hydrogen desorption in MgH2-Nb nanocomposites using synchrotron radiation are presented. Results show that niobium acts like a catalyst for hydrogen absorption and desorption. It is found that hydrogen desorption involves the formation of a short-lived metastable niobium-hydride phase which acts as a gateway through which hydrogen released from MgH2 is Bowing. The desorption kinetics of this system is revealed through temporal profiles showing the lifetimes of the different phases involved.

引用

页数：4

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