Low-temperature chemical synthesis of intermetallic TiFe nanoparticles for hydrogen absorption
Low-temperature chemical synthesis of intermetallic TiFe nanoparticles for hydrogen absorption
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DOI：
10.1016/j.ijhydene.2021.04.083
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发表时间：
2021-06-09
影响因子：
7.2
通讯作者：
Kikuchi, Ryuji
中科院分区：
文献类型：
--
作者：
Kobayashi, Yasukazu;Yamaoka, Shohei;Kikuchi, Ryuji
对TiFe贮氢合金进行纳米化处理，以提高其活化性能。在这里，纯金属间TiFe纳米颗粒（45 nm）是在600 ℃下使用氧化物前体的化学还原制备的，这是化学合成中使用的最低温度。这是使用熔融LiCl中的强还原剂（CaH2）实现的。当用于氢吸收时，所获得的纳米颗粒令人惊讶地表现出几乎没有氢吸收。结果表明，TiFe纳米颗粒比散装粉末更难活化，因为纳米颗粒的氧化表面层变得稳定，这防止了其活化所需的形态变化。(C)2021年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
Nanosizing of TiFe hydrogen storage alloy is conducted to facilitate its activation. Here, pure intermetallic TiFe nanoparticles (45 nm) were prepared using chemical reduction of oxide precursors at 600 degrees C, which is the lowest temperature ever used in chemical synthesis. This was achieved using a strong reducing agent (CaH2) in a molten LiCl. When used for hydrogen absorption, the obtained nanoparticles surprisingly exhibited almost no hydrogen absorption. The results demonstrated that TiFe nanoparticles are more difficult to activate than the bulk powder because the oxidized surface layers of the nanoparticles become stabilized, which prevents the morphological change necessary for their activation. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.