Interaction of the RNi5In (R = La, Ce and Nd) compounds with hydrogen

Evidences for intermediate valence behavior in CeNi5In

“…In similar way to the CeNiIn(IV) compound, it could be tuned by hydrogenation experiments or by pressure. For instance, hydrogenation experiments in the CeNi 5 In compound showed in CeNi 5 InH 0.8 hydride an increase of 2% in unit cell volume respect to the original CeNi 5 In intermetallic [1]. Thus, further experiments with CeNi 5 InH 0.8 hydride may show the effect of change of hybridization on the properties of CeNi 5 In.…”

“…Intermetallic compounds of the type RNi 5 In with R = Nd, La, Ce have been well studied due to its potential use as hydrogen storage materials [1] and their crystallographic properties can also be found in the literature [2]. The behavior of the unit cell volume along this rare earth series is shown in Fig.…”

Hydrogen absorption–desorption characteristics of the LaNi5Sn intermetallic compound

“…This may indicate that the introduction of Sn reduces markedly the hysteresis effects and shows a beneficial intrinsic role of Sn. It seems that the effect of Sn is very specific since in the chemically similar system LaNi 5 In-H the hysteresis is significantly higher (770 J (mol H) −1 at 292 K, according to the data presented in [12]) and even exceeds the values for the LaNi 5 -H system.…”

Thermodynamic and electrochemical hydrogenation properties of LaNi5 − xInx alloys

“…It was shown in Ref. [8] that this type of crystal structure in LaeNieIn system creates the hydride phase with the limited hydrogen content, namely H/f.u. ¼ 0.8/1.8.…”

“…In this paper, the hydrogen absorption properties of LaNi 5 À x In x alloys and their electrochemical hydrogenation abilities are examined with the aim of elucidating whether the above mentioned alloys could be regarded as potential materials for negative electrodes of NiMH batteries. The sorption properties of gaseous hydrogen by the LaNi 5Àx In x alloys have been recently carried out and reported by Bulyk [8] and by Dra sner and Bla zina [9]. The cited authors investigated hydrogen desorption characteristics whereas, we have studied the hydrogen absorption process for similar alloy compositions.…”