Hydrogen Vibration in Hydrogen Storage Materials Investigated by Inelastic Neutron Scattering

Effect of Co-Substitution on Hydrogen Absorption and Desorption Reactions of YMgNi4-Based Alloys

“…The hydrides in this study are not classified into ionic hydrides and complex hydrides. This suggests that the chemical bonding between metal and hydrogen atoms is not clear compared with ionic hydrides and complex hydrides . In this paper, we discuss chemical bonding between the metal and hydrogen atoms as interactions between metal and hydrogen atoms viewed from the directions of hydrogen motions.…”

“…This suggests that the chemical bonding between metal and hydrogen atoms is not clear compared with ionic hydrides and complex hydrides. 37 In this paper, we discuss chemical bonding between the metal and hydrogen atoms as interactions between metal and hydrogen atoms viewed from the directions of hydrogen motions. Hydrogen atom vibrations in the octahedral sites in a Ti−V hydride, β-V 2 H, and BCC alloy hydride phases were observed at 150−500 cm −1 , 33−35 while hydrogen atom vibrations in the tetrahedral sites in the Ti−V hydride and BCC alloy hydride phases were observed at 900−1200 cm −1 .…”

“…Inelastic neutron scattering (INS) is probably the best available vibrational spectroscopic method because of the large neutron scattering cross-section of hydrogen − and the metallic nature of the α-, β-, and γ-phase hydrides. Notably, the hydrogen vibration is hardly observed by Raman and infrared spectroscopies but can be detected by INS. − In contrast, few INS studies in hydrogen pressure studies for hydrogen storage materials have been reported to the best of my knowledge.…”