Abstract
The effect of some different type Ti additives on kinetics of the reaction, LiH+LiNH2↔Li2NH+H2, was intensively investigated in this work. The mixture of LiH and LiNH2 powders with the 1:1 molar ratio and Ti additives with different chemical form were mechanically ball milled under a hydrogen gas atmosphere of 1 MPa at 400 rpm for 2 h and the measurements of thermal hydrogen desorption spectrum (TDS), thermogravimetry (TG) and X-ray diffraction (XRD) were performed. Here, we used Ti (nano particle), Ti (micro particle), TiCl 3, TiO2 (nano particle) and TiO2 (micro particle) as the additives. The results indicated that the Tinano, TiCl3 and TiO2nano doped composites revealed a superior catalytic effect on the TDS properties, while the Timicro and TiO2micro did not show so good catalytic effect being similar to the sample without any additives. In the XRD profiles, there are traces of Ti and TiO2 phases in the Timicro and TiO2micro doped composites, respectively, whereas no trace of Ti, TiCl3 and TiO2 was found in the Tinano, TiCl3 and TiO2nano doped composites. These results indicate that the uniform distribution of nano particle Ti metal between LiH and LiNH2 plays an important role for catalytic effect.
| Original language | English |
|---|---|
| Pages (from-to) | 439-442 |
| Number of pages | 4 |
| Journal | Journal of Alloys and Compounds |
| Volume | 404-406 |
| Issue number | SPEC. ISS. |
| DOIs | |
| Publication status | Published - 2005 Dec 8 |
| Externally published | Yes |
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Keywords
- Gas-solid reactions
- High-energy ball milling
- Hydrogen storage materials
- Nanostructures
- Thermal analysis
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Effect of Ti catalyst with different chemical form on Li-N-H hydrogen storage properties. / Isobe, S.; Ichikawa, T.; Hanada, Nobuko; Leng, H. Y.; Fichtner, M.; Fuhr, O.; Fujii, H.
In: Journal of Alloys and Compounds, Vol. 404-406, No. SPEC. ISS., 08.12.2005, p. 439-442.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of Ti catalyst with different chemical form on Li-N-H hydrogen storage properties
AU - Isobe, S.
AU - Ichikawa, T.
AU - Hanada, Nobuko
AU - Leng, H. Y.
AU - Fichtner, M.
AU - Fuhr, O.
AU - Fujii, H.
PY - 2005/12/8
Y1 - 2005/12/8
N2 - The effect of some different type Ti additives on kinetics of the reaction, LiH+LiNH2↔Li2NH+H2, was intensively investigated in this work. The mixture of LiH and LiNH2 powders with the 1:1 molar ratio and Ti additives with different chemical form were mechanically ball milled under a hydrogen gas atmosphere of 1 MPa at 400 rpm for 2 h and the measurements of thermal hydrogen desorption spectrum (TDS), thermogravimetry (TG) and X-ray diffraction (XRD) were performed. Here, we used Ti (nano particle), Ti (micro particle), TiCl 3, TiO2 (nano particle) and TiO2 (micro particle) as the additives. The results indicated that the Tinano, TiCl3 and TiO2nano doped composites revealed a superior catalytic effect on the TDS properties, while the Timicro and TiO2micro did not show so good catalytic effect being similar to the sample without any additives. In the XRD profiles, there are traces of Ti and TiO2 phases in the Timicro and TiO2micro doped composites, respectively, whereas no trace of Ti, TiCl3 and TiO2 was found in the Tinano, TiCl3 and TiO2nano doped composites. These results indicate that the uniform distribution of nano particle Ti metal between LiH and LiNH2 plays an important role for catalytic effect.
AB - The effect of some different type Ti additives on kinetics of the reaction, LiH+LiNH2↔Li2NH+H2, was intensively investigated in this work. The mixture of LiH and LiNH2 powders with the 1:1 molar ratio and Ti additives with different chemical form were mechanically ball milled under a hydrogen gas atmosphere of 1 MPa at 400 rpm for 2 h and the measurements of thermal hydrogen desorption spectrum (TDS), thermogravimetry (TG) and X-ray diffraction (XRD) were performed. Here, we used Ti (nano particle), Ti (micro particle), TiCl 3, TiO2 (nano particle) and TiO2 (micro particle) as the additives. The results indicated that the Tinano, TiCl3 and TiO2nano doped composites revealed a superior catalytic effect on the TDS properties, while the Timicro and TiO2micro did not show so good catalytic effect being similar to the sample without any additives. In the XRD profiles, there are traces of Ti and TiO2 phases in the Timicro and TiO2micro doped composites, respectively, whereas no trace of Ti, TiCl3 and TiO2 was found in the Tinano, TiCl3 and TiO2nano doped composites. These results indicate that the uniform distribution of nano particle Ti metal between LiH and LiNH2 plays an important role for catalytic effect.
KW - Gas-solid reactions
KW - High-energy ball milling
KW - Hydrogen storage materials
KW - Nanostructures
KW - Thermal analysis
UR - http://www.scopus.com/inward/record.url?scp=28144457887&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=28144457887&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2004.09.081
DO - 10.1016/j.jallcom.2004.09.081
M3 - Article
VL - 404-406
SP - 439
EP - 442
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - SPEC. ISS.
ER -