Synthesis and hydrogen sorption properties of TiV(2-x) Mnx BCC alloys

被引：28

作者：

Bibienne, Thomas ^{[1
]}

Tousignant, Manuel ^{[1
]}

Bobet, Jean-Louis ^{[2
]}

Huot, Jacques ^{[1
]}

机构：

[1] Univ Quebec Trois Rivieres, Hydrogen Res Inst, Trois Rivieres, PQ GA9 5H7, Canada

[2] Inst Chim Mat Condensee Bordeaux, F-33600 Pessac, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 624卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Hydrogen storage; BCC alloys; Metal hydrides; CRYSTAL-STRUCTURE; ABSORPTION;

D O I：

10.1016/j.jallcom.2014.11.060

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：

We report here the effect of activation process of TiV2-xMnx samples (x = 0.2, 0.4, 0.6, 0.8, 0.9). Crystal structures are investigated for the as-cast, hydrogenated and desorbed states. The as-cast samples crystallise with a Body Centered Cubic (BCC) structure, and the lattice parameter decreases as x increases in the TiV2-xMnx series. Upon hydrogenation, the BCC structure expands and turns into a Body Centered Tetragonal (BCT) structure for the monohydride phase and into a Face Centered Cubic (FCC) for the dihydride phase. Pressure-Composition-Isotherms (P-C-I) measurements were performed to study the thermodynamic of TiV2-xMnx alloys and their hydrogen capacities. The maximum hydrogen uptake is observed for TiV1.2Mn0.8 composition, which store 3.4 wt.% of hydrogen at 100 degrees C. The effect of a new activation process on the hydrogen storage capacities of these alloys is discussed. (C) 2014 Elsevier B. V. All rights reserved.

引用

页码：247 / 250

页数：4

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