کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1618013 | 1005698 | 2010 | 6 صفحه PDF | دانلود رایگان |

The diffusion and site occupation of hydrogen in the monohydride phase of V1−xMox–H (0 ≤ x ≤ 0.1) were studied by means of 1H nuclear magnetic resonance (NMR). Hydrogen atoms in VH0.68 occupied the octahedral (O) sites in a body centered tetragonal (BCT) structure. The addition of Mo to V reduced the activation energy for hydrogen diffusion, EH, for the O sites. In V0.9Mo0.1H0.68 hydrogen atoms occupied both the O and tetrahedral (T) sites, which was demonstrated by two components observed in the temperature dependence of the 1H spin-lattice relaxation time. The value of EH for the T sites was lower than that for the O sites. Hydrogen atoms in V0.9Mo0.1H0.68 diffused faster than those in VH0.68.
Research highlights▶ Site occupation of hydrogen in the monohydride phase of V1−xMoxH0.68 (0 ≤ x ≤ 0.1). ▶ Temperature dependence of the 1H spin-lattice relaxation time in V1−xMoxH0.68 (0 ≤ x ≤ 0.1). ▶ Activation energy for hydrogen diffusion for the octahedral and tetrahedral sites.
Journal: Journal of Alloys and Compounds - Volume 507, Issue 2, 8 October 2010, Pages 399–404