Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds: REMgNi(4-x)Alx with RE = La, Ce, Gd

J. G. Roquefere, J. L. Bobet, B. Chevalier, Etsuo Akiba, K. Asano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publication16th World Hydrogen Energy Conference 2006, WHEC 2006
Pages2853-2862
Number of pages10
Publication statusPublished - Dec 1 2006
Event16th World Hydrogen Energy Conference 2006, WHEC 2006 - Lyon, France
Duration: Jun 13 2006Jun 16 2006

Publication series

Name16th World Hydrogen Energy Conference 2006, WHEC 2006
Volume4

Other

Other16th World Hydrogen Energy Conference 2006, WHEC 2006
CountryFrance
CityLyon
Period6/13/066/16/06

Fingerprint

Mechanical alloying
Sorption
Hydrogen
Rare earths
Lattice constants
Desorption
Heat treatment
Temperature

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Roquefere, J. G., Bobet, J. L., Chevalier, B., Akiba, E., & Asano, K. (2006). Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds: REMgNi(4-x)Alx with RE = La, Ce, Gd. In 16th World Hydrogen Energy Conference 2006, WHEC 2006 (pp. 2853-2862). (16th World Hydrogen Energy Conference 2006, WHEC 2006; Vol. 4).

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 proceedingConference contribution

Roquefere, JG, Bobet, JL, Chevalier, B, Akiba, E & Asano, K 2006, Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds: REMgNi(4-x)Alx with RE = La, Ce, Gd. in 16th World Hydrogen Energy Conference 2006, WHEC 2006. 16th World Hydrogen Energy Conference 2006, WHEC 2006, vol. 4, pp. 2853-2862, 16th World Hydrogen Energy Conference 2006, WHEC 2006, Lyon, France, 6/13/06.
Roquefere JG, Bobet JL, Chevalier B, Akiba E, Asano K. Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds: REMgNi(4-x)Alx with RE = La, Ce, Gd. In 16th World Hydrogen Energy Conference 2006, WHEC 2006. 2006. p. 2853-2862. (16th World Hydrogen Energy Conference 2006, WHEC 2006).
Roquefere, J. G. ; Bobet, J. L. ; Chevalier, B. ; Akiba, Etsuo ; Asano, K. / Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds : REMgNi(4-x)Alx with RE = La, Ce, Gd. 16th World Hydrogen Energy Conference 2006, WHEC 2006. 2006. pp. 2853-2862 (16th World Hydrogen Energy Conference 2006, WHEC 2006).
@inproceedings{effe6cd59f734555b6effbd41f4aaa72,
title = "Site occupation disorder and hydrogen sorption properties of pseudo-AB 2 compounds: REMgNi(4-x)Alx with RE = La, Ce, Gd",
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 {\AA} for LaNi 4Mg, 7.030 {\AA} for CeNi4Mg and 7.038 {\AA} 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.",
author = "Roquefere, {J. G.} and Bobet, {J. L.} and B. Chevalier and Etsuo Akiba and K. Asano",
year = "2006",
month = "12",
day = "1",
language = "English",
isbn = "9781622765409",
series = "16th World Hydrogen Energy Conference 2006, WHEC 2006",
pages = "2853--2862",
booktitle = "16th World Hydrogen Energy Conference 2006, WHEC 2006",

}

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 -