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

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 Mg 65Sc 35Pd 2.4H 220, a promising new battery electrode and storage alloy, to LaNi 5H x and to the end-m...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of alloys and compounds Jg. 446; S. 499 - 503
Hauptverfasser: Conradi, Mark S., Mendenhall, Michael P., Ivancic, Timothy M., Carl, Erik A., Browning, Caleb D., Notten, P.H.L., Kalisvaart, W.P., Magusin, Pieter C.M.M., Bowman, R.C., Hwang, Son-Jong, Adolphi, Natalie L.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 31.10.2007
Schlagworte:
Diffusion
Metal hydrides
Nuclear resonances
Diffusion
Metal hydrides
Nuclear resonances
ISSN:0925-8388, 1873-4669
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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 Mg 65Sc 35Pd 2.4H 220, a promising new battery electrode and storage alloy, to LaNi 5H x and to the end-members of the alloy system, ScH 2 and MgH 2. The motion of MgScH is more rapid than in the metallic ScH 2 and the ionic MgH 2, but slower than in LaNi 5H x . 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 YD 2+ x and D in ZrNiD x .
Bibliographie:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2006.11.149