Abstract
The compounds RENi4Mg have been elaborated by mechanical alloying (MA) and a subsequent heat treatment at 600°C for 1 hour. The lattice parameters are in good agreement with those already reported: 7.165 Å for LaNi 4Mg, 7.030 Å for CeNi4Mg and 7.038 Å for GdNi4Mg. The hydrogen sorption behaviours are strongly influenced by the rare earth used: for La compound, hydrogen absorption leads to a structural change and no desorption can be observed, for Ce compound, no reaction towards hydrogen can be noticed and for Gd compound, hydrogen can be absorbed and desorbed reversibly at room temperature. Moreover for GdNi4Mg, no structural change is reported and only a slight volume expansion can be noticed (e.g. 5%). The MA process has also been used successfully for the elaboration of GdNi4-xAlxMg up to x = 1. In these substituted compounds, hydrogen can also been absorbed and desorbed reversibly at room temperature.
| Original language | English |
|---|---|
| Title of host publication | 16th World Hydrogen Energy Conference 2006, WHEC 2006 |
| Pages | 2853-2862 |
| Number of pages | 10 |
| Publication status | Published - Dec 1 2006 |
| Event | 16th World Hydrogen Energy Conference 2006, WHEC 2006 - Lyon, France Duration: Jun 13 2006 → Jun 16 2006 |
Publication series
| Name | 16th World Hydrogen Energy Conference 2006, WHEC 2006 |
|---|---|
| Volume | 4 |
Other
| Other | 16th World Hydrogen Energy Conference 2006, WHEC 2006 |
|---|---|
| Country | France |
| City | Lyon |
| Period | 6/13/06 → 6/16/06 |
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All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Fuel Technology
Cite this
Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds : REMgNi(4-x)Alx with RE = La, Ce, Gd. / Roquefere, J. G.; Bobet, J. L.; Chevalier, B.; Akiba, Etsuo; Asano, K.
16th World Hydrogen Energy Conference 2006, WHEC 2006. 2006. p. 2853-2862 (16th World Hydrogen Energy Conference 2006, WHEC 2006; Vol. 4).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds
T2 - REMgNi(4-x)Alx with RE = La, Ce, Gd
AU - Roquefere, J. G.
AU - Bobet, J. L.
AU - Chevalier, B.
AU - Akiba, Etsuo
AU - Asano, K.
PY - 2006/12/1
Y1 - 2006/12/1
N2 - The compounds RENi4Mg have been elaborated by mechanical alloying (MA) and a subsequent heat treatment at 600°C for 1 hour. The lattice parameters are in good agreement with those already reported: 7.165 Å for LaNi 4Mg, 7.030 Å for CeNi4Mg and 7.038 Å for GdNi4Mg. The hydrogen sorption behaviours are strongly influenced by the rare earth used: for La compound, hydrogen absorption leads to a structural change and no desorption can be observed, for Ce compound, no reaction towards hydrogen can be noticed and for Gd compound, hydrogen can be absorbed and desorbed reversibly at room temperature. Moreover for GdNi4Mg, no structural change is reported and only a slight volume expansion can be noticed (e.g. 5%). The MA process has also been used successfully for the elaboration of GdNi4-xAlxMg up to x = 1. In these substituted compounds, hydrogen can also been absorbed and desorbed reversibly at room temperature.
AB - The compounds RENi4Mg have been elaborated by mechanical alloying (MA) and a subsequent heat treatment at 600°C for 1 hour. The lattice parameters are in good agreement with those already reported: 7.165 Å for LaNi 4Mg, 7.030 Å for CeNi4Mg and 7.038 Å for GdNi4Mg. The hydrogen sorption behaviours are strongly influenced by the rare earth used: for La compound, hydrogen absorption leads to a structural change and no desorption can be observed, for Ce compound, no reaction towards hydrogen can be noticed and for Gd compound, hydrogen can be absorbed and desorbed reversibly at room temperature. Moreover for GdNi4Mg, no structural change is reported and only a slight volume expansion can be noticed (e.g. 5%). The MA process has also been used successfully for the elaboration of GdNi4-xAlxMg up to x = 1. In these substituted compounds, hydrogen can also been absorbed and desorbed reversibly at room temperature.
UR - http://www.scopus.com/inward/record.url?scp=84875603149&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875603149&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84875603149
SN - 9781622765409
T3 - 16th World Hydrogen Energy Conference 2006, WHEC 2006
SP - 2853
EP - 2862
BT - 16th World Hydrogen Energy Conference 2006, WHEC 2006
ER -