Microstructural evolution and hydrogen storage properties of Mg1-xNbx(x=0.17 similar to 0.76) alloy films via Co-Sputtering
作者:Zhang, JG (Zhang, J. G.)[ 1 ] ; Huang, WC (Huang, W. C.)[ 1 ] ; Liu, JW (Liu, J. W.)[ 1 ] ; Wang, H (Wang, H.)[ 1 ] ; Ouyang, LZ (Ouyang, L. Z.)[ 1 ] ; Zeng, MQ (Zeng, M. Q.)[ 1 ] ; Zhu, M (Zhu, M.)[ 1 ]
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷: 44 期: 55 页: 29100-29107 特刊: SI
DOI: 10.1016/j.ijhydene.2019.07.101
出版年: NOV 8 2019
文献类型:Article; Proceedings Paper
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会议名称
会议: 16th International Symposium on Metal-Hydrogen Systems (MH)
会议地点: Guangzhou, PEOPLES R CHINA
会议日期: OCT 28-NOV 02, 2018
摘要
A series of Mg1-xNbx (x = 0.17-0.76) alloy films were prepared by means of magnetron co-sputtering in this work, on the purpose of obtaining better hydrogen storage materials with controllable component and structure. Mg(Nb) solid solution (Mg0.83Nb0.17 and Mg0.76Nb0.24 film), BCC-(Mg1-xNbx) structure (Mg0.70Nb0.30 and Mg0.60Nb0.40 film), and Nb(Mg) solid solution respectively (Mg0.38Nb0.62 and Mg0.24Nb0.76 film) formed in the MgxNb1-x alloy films with the increases of Nb contents. It only took 3 min for BCC-Mg0.60Nb0.40 to absorb 2.3 wt% hydrogen at 473 K and took only 30 min to desorb 1.2 wt% hydrogen at 523 K. Moreover, the BCC structure maintained after hydrogenation or dehydrogenation, which promised good cyclic stability. The hydrogen storage capacities of Mg1-xNbx alloy films were decreased with the increases of Nb contents. Mg0.83Nb0.17 can absorb most hydrogen of 3.8 wt% and Mg0.24Nb0.76 absorbs least hydrogen of 1.0 wt%. The Nb not only played a role of catalyst but also cooperated with Mg to build the BCC-(Mg,Nb) structure. The former provided intergranular path for the hydrogen atoms to diffuse faster; the latter provided more and larger lattice interstices for hydrogen atoms to diffuse in grain more easily. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
关键词
作者关键词:Hydrogen storage; Magnetron co-sputtering; Alloy films; BCC; Mg-Nb
KeyWords Plus:SORPTION KINETICS; ROOM-TEMPERATURE; THIN-FILMS; MG; HYDRIDE; THERMODYNAMICS; ABSORPTION; NANOPARTICLES; STABILITY; SYSTEMS
作者信息
通讯作者地址: Liu, JW (通讯作者)
显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Guangdong, Peoples R China.
地址:
显示更多[ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Guangdong, Peoples R China
电子邮件地址:mejwliu@scut.edu.cn
基金资助致谢
基金资助机构显示详情授权号
National Natural Science Foundation of China
51621001
National Natural Science Foundation of China
51571091
51871098
National Natural Science Foundation of Guangdong Province
2016A030312011
2014A030313222
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出版商
PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Electrochemistry; Energy & Fuels
Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels