Hydrogen storage properties of Zr2Co crystalline and amorphous alloys

被引：7
作者：
Han, Luhui [1 ]
Huang, Huogen [1 ]
Zhang, Pengguo [1 ]
Ma, Ce [2 ]
Wang, Xuefeng [2 ]
Sang, Ge [1 ]
Luo, Wenhua [2 ]
机构：
[1] China Acad Engn Phys, Inst Mat, Mianyang 621907, Sichuan, Peoples R China
[2] Sci & Technol Surface Phys & Chem Lab, Mianyang 621908, Sichuan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Hydrogen storage; Amorphous alloys; Zr2Co alloy; Hydrogen induced; disproportionation; THERMAL-DESORPTION SPECTROSCOPY; INDUCED DISPROPORTIONATION; QUASI-CRYSTALLINE; ION IRRADIATION; ZRCO; ABSORPTION; BEHAVIOR; NI; DIFFUSION; TEMPERATURE;
D O I：
10.1016/j.ijhydene.2020.10.051
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：
To further explore the application feasibility of Zr2Co alloy in tritium-related fields, hydrogenation/dehydrogenation properties of this material of crystalline or amorphous structure, prepared by arc melting or melt spinning, were studied by pressure-composition temperature measurement, X-ray diffraction, differential scanning calorimeter, thermal desorption spectroscopy. It was found that the two kinds of Zr2Co alloys can absorb hydrogen in a close full concentration of similar to 9 mmol/g, and may have similar equilibrium hydrogen pressure in the order of 10(-6) Pa at room temperature. In their hydrogenated samples various hydrides were observed to form, including ZrH2, Zr2CoH5, ZrCoH3 and an amorphous one with gradually decreasing general thermostability. The amorphous alloy exhibited easier hydrogen induced disproportionation caused by highly stable ZrH2 and much slower hydrogen absorption kinetics. This disproportionation behavior of the crystalline alloy was found to be entirely suppressed by changing heating process. The results firmly indicate that crystalline Zr2Co alloy could be more favorable for tritium treatment due to very low equilibrium pressure and the feasibility of eliminating the disproportionation. (C) 2020 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.
引用
收藏
页码：2312 / 2321
页数：10
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