Comparative investigation on the hydrogenation/dehydrogenation characteristics and hydrogen storage properties of Mg3Ag and Mg3Y

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标题

Comparative investigation on the hydrogenation/dehydrogenation characteristics and hydrogen storage properties of Mg3Ag and Mg3Y

作者

作者:Ouyang, LZ (Ouyang, L. Z.)[1,2,3 ]; Cao, ZJ (Cao, Z. J.)[1,2 ]; Yao, L (Yao, L.)[1,2 ]; Wang, H (Wang, H.)[1,2 ]; Liu, JW (Liu, J. W.)[1,2 ]; Zhu, M (Zhu, M.)[1,2 ]

期刊信息


INTERNATIONAL JOURNAL OF HYDROGEN ENERGY


卷:39

期:25

页:13616-13621

DOI:10.1016/j.ijhydene.2014.02.135

出版年:AUG 22 2014

文献类型:Article

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摘要

The hydrogenation/dehydrogenation characteristics and hydrogen storage properties of nominal Mg3Ag and Mg3Y alloys prepared by induction melting were investigated. The asmelted Mg3Ag alloy was composed of Mg54Ag17 phase, while Mg3Y consisted of Mg24Y5 and Mg2Y phases. MgmAgi, transformed into MgAg and MgH2 during the first hydrogenation, and the phase transition of the following hy/dehydrogenation cycles was Mg3Ag + 2H(2) <-> MgAg + 2MgH(2). Both Mg24Y5 and Mg2Y undertook disproportion reactions and decomposed into MgH2 and YH3. Experimental and calculated results demonstrated that there was no necessary relation between the thermodynamic stabilities and the size interstices in these alloys. The dehydrogenation enthalpy change (Delta H) and entropy change (Delta S) of Mg3Ag were calculated and compared with that of pure Mg, which indicated that the increase of Delta S could counteract the stabilization effect of Delta H, which offered a method for tuning the thermodynamic properties of Mg-based alloys. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

关键词

作者关键词:Hydrogen storage; Magnesium alloys; Induction melting; Thermodynamics

作者信息

作者信息

通讯作者地址:Zhu, M (通讯作者)

显示更多S China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China.


地址:

显示更多[ 1 ] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China
显示更多[ 2 ] S China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China
显示更多[ 3 ] S China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China


电子邮件地址:memzhu@scut.edu.cn

出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

类别分类

类别 / 分类

研究方向:Chemistry; Electrochemistry; Energy & Fuels

Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels