NMR to determine rates of motion and structures in metal-hydrides

M.S. Conradi, M.P. Mendenhall, T.M. Ivancic, E.A. Carl, C.D. Browning, P.H.L. Notten, W.P. Kalisvaart, P.C.M.M. Magusin, R.C. Bowman, S.J. Hwang, N.L. Adolphi

Research output: Contribution to journalArticleAcademicpeer-review

39 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)499-503
JournalJournal of Alloys and Compounds
Volume446-447
DOIs
Publication statusPublished - 2007

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