EXAFS characterization of TiVCrMn hydrogen storage alloy upon hydrogen absorption-desorption cycles

被引：3

作者：

Wan, Chubin ^{[1
]}

Ju, Xin ^{[1
]}

Wang, Yuting ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 01期

基金：

中国国家自然科学基金;

关键词：

EXAFS; Solid solution alloy; Theoretical calculation; Hydrogen storage; Bond length; XRD;

D O I：

10.1016/j.ijhydene.2011.03.080

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：

Extended X-ray absorption fine structure (EXAFS) measurements at room temperature at the Ti, V, and Cr K absorption edges were applied to a TiVCrMn alloy subjected to 300 cycles of hydrogen absorption-desorption. The model of the cubic symmetry and atom random distribution is used to fit the EXAFS spectra. The FEFF calculations show relatively good agreement using this model. The EXAFS analysis reveals the variation of local structure of the TiVCrMn alloy with cycling. Aside from the Ti-Cr and Cr-Cr distances, noticeable changes in the other bond lengths were observed during cycling, which can be due to the entrance of hydrogen and lattice contraction in the alloy cells. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：990 / 994

页数：5

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