Nanostructure-induced hydrogenation of layered compound MgB2

Hai Wen Li; Tomoya Matsunaga; Yigang Yan; Hideki Maekawa; Mamoru Ishikiriyama; Shin Ichi Orimo

doi:10.1016/j.jallcom.2010.06.101

Nanostructure-induced hydrogenation of layered compound MgB₂

Hai Wen Li, Tomoya Matsunaga, Yigang Yan, Hideki Maekawa, Mamoru Ishikiriyama, Shin Ichi Orimo

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We investigated the hydrogenation properties of layered compound MgB ₂ mechanically milled under a hydrogen pressure of 1.0 MPa. The total hydrogen concentration after milling for 600 min was approximately 1.0 mass%. No hydrogen insertion into MgB₂ interlayer was observed from interlayer distance analysis. On the other hand, mechanical milling generated the nanostructured MgB₂ with grain boundary defects in which B-H covalent bond and/or Mg-H bond were assumed to be formed. The nanostructure with grain boundary defects significantly promoted the subsequent high pressure (40.0 MPa) hydrogenation of MgB₂ for the synthesis of Mg(BH ₄)₂ comprising [BH₄]^- anions with B-H covalent bonds.

Original language	English
Pages (from-to)	654-656
Number of pages	3
Journal	Journal of Alloys and Compounds
Volume	505
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2010.06.101
Publication status	Published - 2010 Sept 3

Keywords

Grain boundary
Hydride
Hydrogen
Hydrogen storage
Mechanical alloying
Nanostructured materials

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2010.06.101

Cite this

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title = "Nanostructure-induced hydrogenation of layered compound MgB2",

abstract = "We investigated the hydrogenation properties of layered compound MgB 2 mechanically milled under a hydrogen pressure of 1.0 MPa. The total hydrogen concentration after milling for 600 min was approximately 1.0 mass%. No hydrogen insertion into MgB2 interlayer was observed from interlayer distance analysis. On the other hand, mechanical milling generated the nanostructured MgB2 with grain boundary defects in which B-H covalent bond and/or Mg-H bond were assumed to be formed. The nanostructure with grain boundary defects significantly promoted the subsequent high pressure (40.0 MPa) hydrogenation of MgB2 for the synthesis of Mg(BH 4)2 comprising [BH4]- anions with B-H covalent bonds.",

keywords = "Grain boundary, Hydride, Hydrogen, Hydrogen storage, Mechanical alloying, Nanostructured materials",

author = "Li, {Hai Wen} and Tomoya Matsunaga and Yigang Yan and Hideki Maekawa and Mamoru Ishikiriyama and Orimo, {Shin Ichi}",

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AU - Li, Hai Wen

AU - Matsunaga, Tomoya

AU - Yan, Yigang

AU - Maekawa, Hideki

AU - Ishikiriyama, Mamoru

AU - Orimo, Shin Ichi

PY - 2010/9/3

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N2 - We investigated the hydrogenation properties of layered compound MgB 2 mechanically milled under a hydrogen pressure of 1.0 MPa. The total hydrogen concentration after milling for 600 min was approximately 1.0 mass%. No hydrogen insertion into MgB2 interlayer was observed from interlayer distance analysis. On the other hand, mechanical milling generated the nanostructured MgB2 with grain boundary defects in which B-H covalent bond and/or Mg-H bond were assumed to be formed. The nanostructure with grain boundary defects significantly promoted the subsequent high pressure (40.0 MPa) hydrogenation of MgB2 for the synthesis of Mg(BH 4)2 comprising [BH4]- anions with B-H covalent bonds.

AB - We investigated the hydrogenation properties of layered compound MgB 2 mechanically milled under a hydrogen pressure of 1.0 MPa. The total hydrogen concentration after milling for 600 min was approximately 1.0 mass%. No hydrogen insertion into MgB2 interlayer was observed from interlayer distance analysis. On the other hand, mechanical milling generated the nanostructured MgB2 with grain boundary defects in which B-H covalent bond and/or Mg-H bond were assumed to be formed. The nanostructure with grain boundary defects significantly promoted the subsequent high pressure (40.0 MPa) hydrogenation of MgB2 for the synthesis of Mg(BH 4)2 comprising [BH4]- anions with B-H covalent bonds.

KW - Grain boundary

KW - Hydride

KW - Hydrogen

KW - Hydrogen storage

KW - Mechanical alloying

KW - Nanostructured materials

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