Stabilisation of high dissociation pressure hydrides of formula La1−Ce Ni5 (x=0–0.3) with carbon monoxide

Stability of AB5-type hydrogen storage alloys

“…It can be seen fromFig. 2that for these three series compounds, the cell volumes decreased linearly with Ca or Ce content x, similar linear dependence of cell volume V have also been reported by Corre et al[13] for La 1−x Ce x Ni 5 compounds and by Shinar et al[4] for La 1−x Ca x Ni 5 compounds. FromFig.…”

“…3 and 4 show the experimental results together with the theoretical curve drawn from Eqs. (11)- (13). It can be seen that the Eqs.…”

“…(4) The cell volumes of unhydrided compounds varied linearly with A content x (based on our own experimental results and those of Shinar et al [4] and Corre et al [13]):…”

Passivation and reactivation of Ti25V35Cr40 hydrides by cycling with impure hydrogen gas

“…This is because the surfaces of MHs are passivated and so lose their activities for the dissociative chemisorption of H 2 due to the occurrence of surface contaminants, such as oxides, hydroxides, and carbonyl moieties. (2) The effect of MH stabilization by the impurities [23,24]. When strong impurities, such as CO or SO, are present on the surface of the MHs, the MHs will be sealed closely with them.…”

Studies on La based intermetallic hydrides to determine their suitability in metal hydride based cooling systems

“…Recently, it was reported that the hydrogen storage capacity of La 1Àx Ce x Ni 5 hydrides increased for x ¼ 0e0.5; beyond x ¼ 0.5, it led to a decrease in the hydrogen storage capacity. It was also reported that the plateau pressure increases with a decrease in the unit cell volume through Ce substitution [16,17]. Additionally, studies on hydrogen storage, thermodynamic and kinetics properties of different LaeMgeNi intermetallics have been done by several researchers [18e20] and it was reported that LaeMgeNi based hydrides has low dissociation temperature and are good candidate for reversible hydrogen storage applications.…”