کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1617591 | 1005690 | 2011 | 5 صفحه PDF | دانلود رایگان |
The paper is focusing on the modification of the crystal lattice upon the hydrogenation of La2Pd2In and hydrogen desorption from La2Pd2In hydrides. The synthesis at 1 bar of hydrogen produces a crystalline hydride with 1.5 H atoms per formula unit and the volume expansion of ΔV/V = 6.0%. The synthesis at 10 and 100 bar H2 pressures leads to an amorphous state and with 4 + δ H atoms/f.u. The uptake of hydrogen leads to the decrease of the Debye temperature of La2Pd2In and modification of the optical phonon spectrum.
Research highlights▶ La2Pd2In hydride is crystalline with 1.5 H atoms per formula unit and amorphous at 4 H atoms/f.u. ▶ Volume expansion of La2Pd2In due to hydrogenation reaches 6.0% (or +4.9 Å3/H atom) and is anisotropic. ▶ Hydrogenation “softens” the lattice of La2Pd2In.
Journal: Journal of Alloys and Compounds - Volume 509, Issue 10, 10 March 2011, Pages 4185–4189