Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1620335 | Journal of Alloys and Compounds | 2010 | 4 Pages |
Abstract
A vacuum heat pretreatment is applied, in order to enhance the reactivity of hydride-forming metals towards hydrogen reaction. For gadolinium, as for other rare-earth metals and some actinides, pretreatment temperatures of about 470 K are sufficient to induce such activation. The different factors that may be involved in that activation mechanism are identified and analyzed for gadolinium and their role is evaluated. It is concluded that the most prominent effect is desorption of surface hydroxyl groups, which impede the dissociative chemisorptions of hydrogen.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
G. Benamar, D. Schweke, N. Shamir, S. Zalkind, T. Livneh, A. Danon, G. Kimmel, M.H. Mintz,