Low-temperature chemical synthesis of intermetallic TiFe nanoparticles for hydrogen absorption

被引：20

作者：

Kobayashi, Yasukazu ^{[1
]}

Yamaoka, Shohei ^{[2
]}

Yamaguchi, Shunta ^{[2
]}

Hanada, Nobuko ^{[2
]}

Tada, Shohei ^{[3
]}

Kikuchi, Ryuji ^{[4
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Interdisciplinary Res Ctr Catalyt Chem, Cent 5,1-1-1 Higashi, Tsukuba, Ibaraki 3058565, Japan

[2] Waseda Univ, Dept Appl Chem, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan

[3] Ibaraki Univ, Dept Mat Sci & Engn, 4-12-1 Nakanarusawacho, Hitachi, Ibaraki 3168511, Japan

[4] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 43期

关键词：

Intermetallic TiFe; Chemical synthesis; Calcium hydride; Nanoparticles; Hydrogen absorption; ELECTROCHEMICAL REDUCTION; COMBUSTION SYNTHESIS; ILMENITE; FETI; FERROTITANIUM; OXIDE; POWDERS;

D O I：

10.1016/j.ijhydene.2021.04.083

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：

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.

引用

页码：22611 / 22617

页数：7

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