Effect of substitutional Mo on diffusion and site occupation of hydrogen in the BCT monohydride phase of V-H system studied by 1H NMR

Kohta Asano; Shigenobu Hayashi; Yumiko Nakamura; Etsuo Akiba

doi:10.1016/j.jallcom.2010.08.018

Effect of substitutional Mo on diffusion and site occupation of hydrogen in the BCT monohydride phase of V-H system studied by ¹H NMR

Kohta Asano, Shigenobu Hayashi, Yumiko Nakamura, Etsuo Akiba

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

20 Citations (Scopus)

Abstract

The diffusion and site occupation of hydrogen in the monohydride phase of V_1-xMo_x-H (0 ≤ x ≤ 0.1) were studied by means of ¹H nuclear magnetic resonance (NMR). Hydrogen atoms in VH _0.68 occupied the octahedral (O) sites in a body centered tetragonal (BCT) structure. The addition of Mo to V reduced the activation energy for hydrogen diffusion, E_H, for the O sites. In V_0.9Mo _0.1H_0.68 hydrogen atoms occupied both the O and tetrahedral (T) sites, which was demonstrated by two components observed in the temperature dependence of the ¹H spin-lattice relaxation time. The value of E_H for the T sites was lower than that for the O sites. Hydrogen atoms in V_0.9Mo_0.1H_0.68 diffused faster than those in VH_0.68.

Original language	English
Pages (from-to)	399-404
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	507
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2010.08.018
Publication status	Published - Oct 8 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2010.08.018

Cite this

@article{004ebffff1044ae191724490bf43a40e,

title = "Effect of substitutional Mo on diffusion and site occupation of hydrogen in the BCT monohydride phase of V-H system studied by 1H NMR",

abstract = "The diffusion and site occupation of hydrogen in the monohydride phase of V1-xMox-H (0 ≤ x ≤ 0.1) were studied by means of 1H nuclear magnetic resonance (NMR). Hydrogen atoms in VH 0.68 occupied the octahedral (O) sites in a body centered tetragonal (BCT) structure. The addition of Mo to V reduced the activation energy for hydrogen diffusion, EH, for the O sites. In V0.9Mo 0.1H0.68 hydrogen atoms occupied both the O and tetrahedral (T) sites, which was demonstrated by two components observed in the temperature dependence of the 1H spin-lattice relaxation time. The value of EH for the T sites was lower than that for the O sites. Hydrogen atoms in V0.9Mo0.1H0.68 diffused faster than those in VH0.68.",

author = "Kohta Asano and Shigenobu Hayashi and Yumiko Nakamura and Etsuo Akiba",

year = "2010",

month = oct,

day = "8",

doi = "10.1016/j.jallcom.2010.08.018",

language = "English",

volume = "507",

pages = "399--404",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

number = "2",

}

TY - JOUR

T1 - Effect of substitutional Mo on diffusion and site occupation of hydrogen in the BCT monohydride phase of V-H system studied by 1H NMR

AU - Asano, Kohta

AU - Hayashi, Shigenobu

AU - Nakamura, Yumiko

AU - Akiba, Etsuo

PY - 2010/10/8

Y1 - 2010/10/8

N2 - The diffusion and site occupation of hydrogen in the monohydride phase of V1-xMox-H (0 ≤ x ≤ 0.1) were studied by means of 1H nuclear magnetic resonance (NMR). Hydrogen atoms in VH 0.68 occupied the octahedral (O) sites in a body centered tetragonal (BCT) structure. The addition of Mo to V reduced the activation energy for hydrogen diffusion, EH, for the O sites. In V0.9Mo 0.1H0.68 hydrogen atoms occupied both the O and tetrahedral (T) sites, which was demonstrated by two components observed in the temperature dependence of the 1H spin-lattice relaxation time. The value of EH for the T sites was lower than that for the O sites. Hydrogen atoms in V0.9Mo0.1H0.68 diffused faster than those in VH0.68.

AB - The diffusion and site occupation of hydrogen in the monohydride phase of V1-xMox-H (0 ≤ x ≤ 0.1) were studied by means of 1H nuclear magnetic resonance (NMR). Hydrogen atoms in VH 0.68 occupied the octahedral (O) sites in a body centered tetragonal (BCT) structure. The addition of Mo to V reduced the activation energy for hydrogen diffusion, EH, for the O sites. In V0.9Mo 0.1H0.68 hydrogen atoms occupied both the O and tetrahedral (T) sites, which was demonstrated by two components observed in the temperature dependence of the 1H spin-lattice relaxation time. The value of EH for the T sites was lower than that for the O sites. Hydrogen atoms in V0.9Mo0.1H0.68 diffused faster than those in VH0.68.

UR - http://www.scopus.com/inward/record.url?scp=77957112751&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957112751&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2010.08.018

DO - 10.1016/j.jallcom.2010.08.018

M3 - Article

AN - SCOPUS:77957112751

SN - 0925-8388

VL - 507

SP - 399

EP - 404

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 2

ER -

Effect of substitutional Mo on diffusion and site occupation of hydrogen in the BCT monohydride phase of V-H system studied by ¹H NMR

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this