An approach for advancing the hydrogen storage properties via H-induced precipitation of even nanocatalytsts in rapid solidified Mg-Ni-Y alloy fibers

被引：3

作者：

Hu, Shiyang ^{[1
]}

Ding, Xin ^{[1
]}

Chen, Ruirun ^{[1
]}

Ma, Xiangfeng ^{[1
]}

Cao, Wenchao ^{[1
]}

Shen, Hongxian ^{[1
]}

Zhang, Yong ^{[1
]}

Guo, Jingjie ^{[1
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 87卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Hydrogen storage; Magnesium alloys; Rapid solidification; Kinetics; Fiber; DESORPTION PROPERTIES; SORPTION KINETICS; MAGNESIUM; CO; PERFORMANCE; ABSORPTION; BEHAVIOR; PHASE; CU; DEHYDROGENATION;

D O I：

10.1016/j.ijhydene.2024.09.043

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：

Optimization for hydrogen storage properties of Mg-based alloy is mainly restricted by coarse alpha-Mg grains and uneven catalytic phases. In this study, a strategy of melt-spinning rapid solidification is proposed to fabricate one-dimensional Mg97Ni2Y1 alloy fiber with submicron-sized alpha-Mg grains and uniform microstructure. After heat treatment and activation process, ultrafine Mg2Ni and YH2 phases are in-situ generated and uniformly distributed. The results indicate that 5.24 wt% H-2 is absorbed at 305 degrees C in 30 min, higher than the as-cast alloy powder of 4.49 wt% H-2. Meanwhile, the dehydrogenation rate is accelerated at lower temperatures. Based on the DSC curve, the hydrogen pumping effect in the fiber alloy powder is more significant, reducing the dehydrogenation temperature of MgH2. The fiber alloy powder absorbs more hydrogen in stage 1, leading to enhanced hydrogenation kinetics. The uniform and refined microstructure formed by the rapid-solidified fiber is the key factor for enhanced de-/hydrogenation properties.

引用

页码：100 / 106

页数：7

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