Hydrogen uptake in Mg:C thin films

被引：8

作者：

Ingason, A. S. ^{[1
]}

Eriksson, A. K. ^{[1
]}

Olafsson, S. ^{[1
]}

机构：

[1] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 446卷

关键词：

thin films; hydrogen; magnesium; carbon;

D O I：

10.1016/j.jallcom.2007.02.093

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：

Magnesium: carbon films 25 nm thick, with approximately 40% carbon content and a 5 nm Pd capping layer, were co-sputtered in a dc magnetron sputtering chamber. The films were found to be X-ray amorphous. The hydrogen uptake was studied by in situ resistance measurements. The uptake showed one fast process with a time span of a few seconds followed by much slower resistance change, indicating structural relaxation. The isotherms show similar behavior as found in amorphous materials with a broad distribution of binding energies. A significant part of the film showed a reduction in the binding energy of hydrogen in MgH2 that would yield a release temperature of similar to 200 degrees C at 1 bar. (C) 2007 Elsevier B.V. All rights reserved.

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收藏

页码：530 / 533

页数：4

相关论文

共 19 条

[1] Thermodynamic investigation of the magnesium-hydrogen system [J].

Bogdanovic, B ;

Bohmhammel, K ;

Christ, B ;

Reiser, A ;

Schlichte, K ;

Vehlen, R ;

Wolf, U .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 282 (1-2) :84-92

[2] Activation characteristics of graphite modified hydrogen absorbing materials [J].

Bouaricha, S ;

Dodelet, JP ;

Guay, D ;

Huot, J ;

Schulz, R .

JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 325 (1-2) :245-251

[3] ReaxFFMgH reactive force field for magnesium hydride systems [J].

Cheung, S ;

Deng, WQ ;

van Duin, ACT ;

Goddard, WA .

JOURNAL OF PHYSICAL CHEMISTRY A, 2005, 109 (05) :851-859

[4] Magnesium alanate - a material for reversible hydrogen storage? [J].

Fichtner, M ;

Fuhr, O ;

Kircher, O .

JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 356 :418-422

[5] Hydrogen-absorbing magnesium composites prepared by mechanical grinding with graphite: effects of additives on composite structures and hydriding properties [J].

Imamura, H ;

Takesue, Y ;

Akimoto, T ;

Tabata, S .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 293 :564-568

[6] Hydrogen absorption of Mg-based composites prepared by mechanical milling: Factors affecting its characteristics [J].

Imamura, H ;

Sakasai, N ;

Kajii, Y .

JOURNAL OF ALLOYS AND COMPOUNDS, 1996, 232 (1-2) :218-223

[7] APPLICATION OF ORGANIC-COMPOUNDS TO METAL HYDROGEN SYSTEMS AS A TECHNIQUE FOR IMPROVING SORPTION PROPERTIES - A NEW CLASS OF HYDROGEN ABSORBERS [J].

IMAMURA, H ;

NOBUNAGA, T ;

TSUCHIYA, S .

JOURNAL OF THE LESS-COMMON METALS, 1985, 106 (02) :229-239

[8] Hydriding-dehydriding behavior of magnesium composites obtained by mechanical grinding with graphite carbon [J].

Imamura, H ;

Tabata, S ;

Takesue, Y ;

Sakata, Y ;

Kamazaki, S .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2000, 25 (09) :837-843

[9] High hydrogen storage capacity of nanosized magnesium synthesized by high energy ball-milling [J].

Imamura, H ;

Masanari, K ;

Kusuhara, M ;

Katsumoto, H ;

Sumi, T ;

Sakata, Y .

JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 386 (1-2) :211-216

[10] Thermodynamics of hydrogen uptake in Mg films studied by resistance measurements [J].

Ingason, AS ;

Olafsson, S .

JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 404 :469-472