Effect of different transition metal fluorides TMFx (TM=Nb, Co, Ti) on hydrogen storage properties of the 3NaBH4-GdF3 system

被引：9
作者：
Huang, Tianping [1 ,2 ]
Zou, Jianxin [1 ,2 ,3 ,4 ,5 ]
Liu, Huabing [6 ]
Ding, Wenjiang [1 ,2 ,3 ,4 ,5 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, Ctr Hydrogen Sci, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Shanghai Engn Res Ctr Mg Mat & Applicat, Shanghai 200240, Peoples R China
[5] Shanghai Mg Power Tech Co Ltd, Shanghai 200240, Peoples R China
[6] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 823卷
关键词：
NaBH4; GdF3; Transition metal fluorides; Heterogeneous nucleation; SORPTION BEHAVIORS; SODIUM-BOROHYDRIDE; NABH4; STATE; HYDRIDE; DECOMPOSITION; HYDROLYSIS; GENERATION; CAPACITY; KINETICS;
D O I：
10.1016/j.jallcom.2020.153716
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：
Three kinds of transition metal fluorides TMFx (TM = Nb, Co, Ti) were introduced into the 3NaBH(4)-GdF3 hydrogen storage system via mechanical milling. Their effects on the hydrogen storage behaviors of 3NaBH(4)-GdF3 were systematically investigated by means of DSC and volumetric methods. All TMFx exhibited promoting effect on hydrogen desorption properties of 3NaBH(4)-GdF3 to different degrees, especially when NbF5 or TiF3 was added. For example, the hydrogen desorption peak temperature was decreased by 17 degrees C with doping 3 mol% of NbF5. Besides, TiF3 improved also the hydrogen absorption capacity and reversibility of 3NaBH(4)-GdF3. Based on XRD analyses, the role of TMFx on the dehydrogenation and the promoting effect of TiF3 on the reversibility of 3NaBH(4)-GdF3 were clarified. This work helped to understand the combination effect of rare earth metal fluoride (GdF3) and transition metal fluorides on the reversible hydrogen storage properties of NaBH4. (C) 2020 Elsevier B.V. All rights reserved.
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页数：9
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