TY - JOUR
T1 - NMR to determine rates of motion and structures in metal-hydrides
AU - Conradi, M.S.
AU - Mendenhall, M.P.
AU - Ivancic, T.M.
AU - Carl, E.A.
AU - Browning, C.D.
AU - Notten, P.H.L.
AU - Kalisvaart, W.P.
AU - Magusin, P.C.M.M.
AU - Bowman, R.C.
AU - Hwang, S.J.
AU - Adolphi, N.L.
PY - 2007
Y1 - 2007
N2 - Measurements of nuclear magnetic resonance (NMR) relaxation times allow the rates of H and D atomic hopping in metal-hydrides to be determined. A first example compares the rates of H hopping in Mg65Sc35Pd2.4H220, a promising new battery electrode and storage alloy, to LaNi5Hx and to the end-members of the alloy system, ScH2 and MgH2. The motion of MgScH is more rapid than in the metallic ScH2 and the ionic MgH2, but slower than in LaNi5Hx. Magic-angle spinning (MAS) NMR of metal-deuterides is a newer method that can resolve inequivalent D atoms and measure the rate of diffusive exchange between the sites. Examples include the tetrahedral and octahedral sites in YD2+x and D in ZrNiDx.
AB - Measurements of nuclear magnetic resonance (NMR) relaxation times allow the rates of H and D atomic hopping in metal-hydrides to be determined. A first example compares the rates of H hopping in Mg65Sc35Pd2.4H220, a promising new battery electrode and storage alloy, to LaNi5Hx and to the end-members of the alloy system, ScH2 and MgH2. The motion of MgScH is more rapid than in the metallic ScH2 and the ionic MgH2, but slower than in LaNi5Hx. Magic-angle spinning (MAS) NMR of metal-deuterides is a newer method that can resolve inequivalent D atoms and measure the rate of diffusive exchange between the sites. Examples include the tetrahedral and octahedral sites in YD2+x and D in ZrNiDx.
U2 - 10.1016/j.jallcom.2006.11.149
DO - 10.1016/j.jallcom.2006.11.149
M3 - Article
SN - 0925-8388
VL - 446-447
SP - 499
EP - 503
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -