77980-81-5

Usage

Uses

Used in Chemical Industry:
Lanthanum-nickel alloy is used as a catalyst for the synthesis of multi-walled carbon nanotubes (MWNTs) by chemical vapor deposition (CVD). Its high catalytic activity and stability contribute to the efficient production of MWNTs, which have a wide range of applications in the fields of electronics, materials science, and energy storage.
Used in Energy Storage:
Lanthanum-nickel alloy is used for hydrogen storage applications due to its high hydrogen storage capacity. This property makes it an ideal material for developing advanced hydrogen storage systems, which are crucial for clean energy technologies and reducing our reliance on fossil fuels.

Upstream product

• 7439-91-0 lanthanum 
• 7440-02-0 nickel 
• 7439-95-4 magnesium 
• 7440-31-5 tin 

Relevant academic research and scientific papers

Structure of LaNi2.286 and the La-Ni system from LaNi1.75 to LaNi2.50

Seven alloys near the LaNi2 composition were studied by metallographic and X-ray techniques. Alloys that were cooled slowly were found to consist of two phases: from x=1.75 to 2.25 and from x=2.40 to 2.50, where x is the Ni:La ratio. A single-phase alloy was found near x=2.30. A complete single-crystal structure analysis showed that the true composition of this tetragonal phase (a=7.355 Angstrom and c=14.51 Angstrom) is LaNi2.286. The space group is I42m and the unit cell contains 32 nickel atoms and 14 lanthanum atoms. This tetragonal structure is related to the cubic C15 Laves phase such that at approximately equals ac and ct approximately equals 2ac and two lanthanum atoms are removed from the tetragonal structure. The formation of this phase is thought to result from the large disparity between the lanthanum and nickel radii (rLa/rNi=1.506) relative to that expected for the ideal constituent atoms of the AB2 cubic Laves phase (rA/rB=1.225), which prevents the formation of the ideal C15 Laves phase.

Formation of nanostructured LaMg2Ni by rapid quenching and intensive milling and its hydrogen reactivity

The formation of the nanostructured orthorhombic LaMg2Ni phase using the melt-spinning and the intensive ball milling routes has been studied for the La25Mg50Ni25 and La20Mg50Ni30/sub

Effect of sintering conditions on the formation of single-phase NdMgNi4 compound and its hydrogen storage properties

Effects of different sintering conditions on the formation of single-phase NdMgNi4 compound and its electrochemical properties have been investigated. XRD analysis shows that an ideal single-phase compound of NdMgNi4 can be synthesized by sintering the pressed tablets of mixture of Mg, Ni and NdNi powders under 973 K for 5 h; single-phase compounds of REMgNi4 (RE = La, Ce, Pr) can be synthesized in this way as well. The electrochemical properties were measured by simulated battery tests. The maximum discharge capacity of NdMgNi4 compound was about 200 mAh/g, and just 78 mAh/g for CeMgNi4 compound. NdMgNi4 compound could store 3.5 H/M of hydrogen under 2.5 MPa at 298 K, whilst it is difficult to absorb hydrogen at a higher temperature (473 K).

Effect of chemical and external pressure on the structure of intermetallic compound CeNi

Neutron powder diffraction was employed to study the structural modifications of the intermediate-valence compound CeNi at room temperature induced by either chemical or external pressure. For the first time we were able to record the diffraction pattern resulting from the pressure-induced first-order phase transition occurring in CeNi at 300 K. At pressure P = 2 GPa we observe the coexistence of two phases while only single pressure-induced phase is visible at P = 5 GPa. The results obtained are indicative of a higher symmetry of the collapsed structure as compared to the CrB-type ambient pressure structure of CeNi. The critical pressure range around 2 GPa is found to be agreement with the previous estimation derived from the thermopower measurements.

Electrical and thermal transport in CeNi and LaNi

We have measured the electrical resistivity and thermal conductivity of CeNi, LaNi and La 0.15Ce 0.85Ni in the temperature range 4-400 K simultaneously on the same specimen using the TTO option in PPMS (Quantum Design) facility. Anom

The isothermal section of the La-Ni-Nb ternary system at 673 K

The isothermal section of the phase diagram of the ternary system La-Ni-Nb at 673 K has been investigated by X-ray diffraction, differential thermal analysis, optical microscopy, and electron microscopy techniques. It consists of 14 single-phase regions,

The isothermal section of the phase diagram of the La-Ni-Cu ternary system at 673 K

The isothermal section of the phase diagram of the ternary system La-Ni-Cu has been investigated by X-ray diffraction, differential thermal analysis, optical microscopy and electron microscopy techniques. It consists of 13 single-phase regions, 23 two-phase regions and 11 three-phase regions. At 673 K, the maximum solid solubility of Cu in La2Ni3, La 2Ni3, La2Ni3, LaNi is and LaNi is about 2, 2, 3, 3 and 5 at.% Cu, respectively. The solid solubility of Cu in La7Ni3 and Ni in LaCu6 is too small to observe. Cu and Ni can replace each other in LaNi5 and LaCu5, the LaNi5 and LaCu5 form a continuous solid solution. The maximum solid solubility of Ni in LaCu2 and LaCu is about 15 and 4at.% Ni, respectively. A new ternary compound La10Cu 85Ni5 has been observed in the La-Ni-Cu ternary system.

Cycling durability and degradation behavior of La-Mg-Ni-Co-type metal hydride electrodes

The cycling durability and degradation behavior of the La-Mg-Ni-based hydrogen storage alloys La0.7Mg0.3Ni 3.4-xCoxMn0.1 (x = 0, 0.75, 1.3) during charge/discharge cycling has been systematically studied by XRD, SEM, EIS, XPS and AES measurements. The reasons for the improvement of the cycling stability of the alloy electrodes with increasing Co content have also been analyzed and discussed. The results show that the pulverization of the alloy particles and the oxidation/corrosion of the active components of the alloys during charge/discharge cycling in the alkaline electrolyte are the two main factors responsible for the fast capacity degradation of the La-Mg-Ni-based alloy electrodes, and the capacity degradation mechanism can be decomposed into three consequent stages, i.e., the pulverization and Mg oxidation stage, the Mg and La oxidation stage and the oxidation and passivation stage. With the increase in Co content, the cell volume expansion ratio ΔV/V of the two main phases during hydrogenation/dehydrogenation was obviously decreased, which results in a reduction of the pulverization of the alloy particles and, consequently, in an increase in the charge and discharge efficiency and a decrease in the rate of contact of the fresh alloy surface with alkaline electrolyte and a subsequent lower rate of oxidation/corrosion. It is believed to be the most important reason responsible for the improvement of the cycling stability of the alloy electrodes with increasing Co content.

Structural and Electrochemical Properties of the La0.7Mg 0.3Ni2.975-xCo0.525Mnx Hydrogen Storage Electrode Alloys

The effect of partial substitution of Mn for Ni on the structural and electrochemical properties of the La0.7Mg0.3Ni 2.975-xCo0.525Mnx (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5) hydrogen storage alloys has be

The 673 K isothermal section of the La-Ni-Sn ternary system

The phase relationships in the La-Ni-Sn ternary system at 673 K have been investigated by means of X-ray powder diffraction (XRD), differential thermal analysis (DTA), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Most of this ternary system was studied at 673 K. At this temperature, a new ternary compound whose atomic ratio is close to La/Ni/Sn = 1:1:3 has been found. The existences of 15 binary compounds La 7Ni3, LaNi, La2Ni3, La 7Ni16, LaNi3, La2Ni7, LaNi5, Ni3Sn, Ni3Sn2, Ni 3Sn4, La5Sn3, La5Sn 4, LaSn, La3Sn5, LaSn3 and seven other ternary compounds LaNi5Sn, LaNi4Sn2, LaNi2Sn2, La3Ni2Sn6, La3Ni2Sn7, La3Ni8Sn 16, LaNiSn have been confirmed too. There are 31 three-phase regions in the 673 K isothermal section. Due to the lower melting point of Sn (about 504 K), a small part of the ternary system that lies in the Sn-rich part was studied at 483 K.