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

被引：41

作者：

Conradi, Mark S.

Mendenhall, Michael P.

Ivancic, Timothy M. ^{[1
]}

Carl, Erik A.

Browning, Caleb D.

Notten, P. H. L.

Kalisvaart, W. P.

Magusin, Pieter C. M. M.

Bowman, R. C., Jr.

Hwang, Son-Jong

Adolphi, Natalie L.

机构：

[1] Washington Univ, Dept Phys 1105, St Louis, MO 63130 USA

[2] Philips Res Labs, NL-5656 AE Eindhoven, Netherlands

[3] Eindhoven Univ Technol, NL-5600 MB Eindhoven, Netherlands

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

[6] New Mexico Resonance, Albuquerque, NM 87106 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 446卷

基金：

美国国家科学基金会;

关键词：

metal hydrides; diffusion; nuclear resonances;

D O I：

10.1016/j.jallcom.2006.11.149

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：499 / 503

页数：5

共 28 条

[1] Magic-angle spinning NMR study of deuterium site occupancy and dynamics in ZrNiD1.0 and ZrNiD3.0 (vol B 65, art no 024301, 2001) -: art. no. 149901 [J].