Effects of SnO2 on hydrogen desorption of MgH2

被引：31

作者：

Abdellatief, M. ^{[1
,2
]}

Campostrini, R. ^{[1
]}

Leoni, M. ^{[1
]}

Scardi, P. ^{[1
]}

机构：

[1] Univ Trento, I-38123 Trento, Italy

[2] EIettra Sincrotrone, I-34149 Trieste, Italy

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 11期

关键词：

Hydrogen energy; Ball milling; Magnesium hydride; Hydrogen desorption; Structural defects; MAGNESIUM HYDRIDE; SORPTION KINETICS; STORAGE PROPERTIES; METALS; NB2O5;

D O I：

10.1016/j.ijhydene.2013.02.016

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：

The hydrogen desorption properties of Magnesium Hydride (MgH2) ball milled with cassiterite (SnO2) have been investigated by X-ray powder diffraction and thermal analysis. Milling of pure MgH2 leads to a reduction of the desorption temperature (up to 60 K) and of the activation energy, but also to a reduction of the quantity of desorbed hydrogen, referred to the total MgH2 present, from 7.8 down to 4.4 wt%. SnO2 addition preserves the beneficial effects of grinding on the desorption kinetics and limits the decrease of desorbed hydrogen. Best tradeoff - activation energy lowered from 175 to 148 kJ/mol and desorbed hydrogen, referred to the total MgH2 present, lowered from 7.8 to 6.8 wt% - was obtained by comilling MgH2 with 20 wt% SnO2. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：4664 / 4669

页数：6

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