Lanthanum--nickel (1/4) | 65380-45-2

• 分子结构分类: 无机化合物 - 均相金属化合物 - 金属间镧系化合物
• 英文名称: Lanthanum--nickel (1/4)
• 英文别名: lanthanum;nickel
• CAS: 65380-45-2
• 化学式: LaNi₄
• 分子量: 373.665
• InChiKey: CYHIEWQCXZYEKK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  5
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  magnesium 、 Lanthanum--nickel (1/4) 以 neat (no solvent) 为溶剂， 反应 250.0h， 生成
  参考文献：
  名称：

  La 1-x Nd x MgNi 4-y Co y 合金的固气和电化学加氢性能

  摘要：

  摘要 采用粉末烧结法合成了新型La1-xNdxMgNi4-yCoy (x = 0, 0.5, 1; y = 0, 0.5, 1)合金，并对其晶体结构和储氢性能进行了系统研究。X射线衍射分析表明，La1-xNdxMgNi4-yCoy合金属于MgCu4Sn型结构。合金的储氢能力在 1.1-1.7 wt % H 范围内。的合金氢化物在室温下在空气中稳定。XRD 研究表明，氢化物保留了起始合金的晶体结构，同时使蜂窝体积增加了 15-23%。压力-成分-温度 (PСT) 测量表明，氢化物的热力学稳定性随着 Nd 含量的增加而降低，而合金中 Co 含量的增加导致它们的稳定性增加，这通过随 Co 含量降低解吸平台压力来证明。电化学研究表明，富含 La 的电极材料表现出最大的放电容量（300-330 mAh/g），但掺 Nd 的电极材料表现出更好的循环稳定性。

  DOI：

  10.1016/j.jallcom.2018.01.067
• 作为产物：
  描述：

  lanthanum(III) nitrate 、 nickel(II) nitrate 反应 3.0h， 生成 Lanthanum--nickel (1/4)
  参考文献：
  名称：

  Calcination conditions and stability of supported Ni₄La oxide for catalytic decomposition of N₂O

  摘要：

  在氮气中于 400 ℃ 煅烧的新型催化剂（支撑 Ni4La 氧化物）可在 375 ℃ 下完全分解 N2O。

  DOI：

  10.1039/c4ra13455a

文献信息

• A Structural Study of the Homogeneity Domain of LaNi5
  作者：J.-M. Joubert、R. Černý、M. Latroche、E. Leroy、L. Guénée、A. Percheron-Guégan、K. Yvon

  DOI：10.1006/jssc.2001.9499

  日期：2002.6

  LaNi5 is a very important intermetallic compound for hydrogen storage applications. Its homogeneity range at 1200°C has been investigated by single-crystal X-ray diffraction, electron probe microanalysis, and mass density measurements. At the nickel-rich end the hexagonal structure (CaCu5 type) extends to the composition LaNi5.45. The excess of nickel is accommodated by random substitutions of lanthanum

  LaNi 5是用于氢存储应用的非常重要的金属间化合物。通过单晶X射线衍射，电子探针显微分析和质量密度测量研究了其在1200°C的均匀范围。在富镍端，六边形结构（CaCu 5型）延伸至成分LaNi 5.45。镍原子被镍哑铃随机取代镧原子，以及镍原子的位移（可能与La原子取代相关），从而容纳了过量的镍。原子间距离表明，Ni原子的位移发生在朝向空La原子位点的方向，即朝向Ni哑铃的中心。在贫镍端，结构扩展到成分LaNi4.88。镧的过量和镍原子位点上同时出现的镧原子和空位可以弥补这种过量的镧。两种模型均与质量密度和电子探针显微分析测量结果一致。已经测量了氢化热力学性质作为组成的函数。
• Hydrogen in La₂MgNi₉D₁₃: The Role of Magnesium
  作者：Roman V. Denys、Volodymyr A. Yartys、Colin J. Webb

  DOI：10.1021/ic202705u

  日期：2012.4.2

  structures of the AB5 + Laves phase types. However, the Laves type slab LaMgNi4D7.9 is different from the characterized individual LaMgNi4D4.85 hydride. This results from the filling of a greater variety of interstitial sites in the La2MgNi9D13/LaMgNi4D7.9, including MgNi2, Ni4, (La/Mg)2Ni2, and (La/Mg)Ni3, in contrast with individual LaMgNi4D4.85 where only La2MgNi2 and Ni4 interstitials are occupied. Despite

  通过气态氢或电化学方法充入的La 3– x Mg x Ni 9合金的可逆储氢能力在La 2 MgNi 9组成下达到其最大值。由于（La，Mg）Ni 3–3.5合金是Ni–MH电池中高级金属氢化物电极中使用的材料，因此引起了人们对La 2 MgNi 9 –H 2（D 2）。在目前的工作中，已经通过在H 2 / D中使用原位同步加速器X射线和中子粉末衍射研究了该系统2种气体并通过执行压力-成分-温度测量。饱和的La 2的MgNi 9种d 13.1氢化经由各向同性膨胀形式和结晶具有三方晶系晶胞（空间群[R 3米（166号）;一个= 5.4151（1）埃，c ^ = 26.584（2）埃，V = 675.10（6）3）。研究的混合结构由两层堆叠构成，类似于现有的金属间化合物LaNi 5（CaCu 5型）和LaMgNi 4（Laves型）。这些被D占据以形成LaNi 5 D 5.2和LaMgNi 4
• Effect of magnesium content and quenching rate on the phase structure and composition of rapidly solidified La2MgNi9 metal hydride battery electrode alloy
  作者：Christopher C. Nwakwuo、Thomas Holm、Roman V. Denys、Weikang Hu、Jan Petter Maehlen、Jan Ketil Solberg、Volodymyr A. Yartys

  DOI：10.1016/j.jallcom.2012.12.017

  日期：2013.4

  The phase structure and composition of La2MgNi9 metal hydride battery electrode alloy after rapid solidification at wheel surface speeds of 10.5 m s (1) and 4.2 m s (1), have been investigated by electron microscopy (SEM, TEM) and X-ray diffraction techniques. The alloy is multi-phase structured, containing rhombohedral La2MgNi9 as the main phase with small amounts of LaNi5, La3MgNi14 and LaMgNi4 as secondary compounds. The high vapour pressure and low melting point of magnesium compared with other constituent elements and its eventual loss from the melt prior to rapid solidification, as well as the peritectic mechanism of the formation of La2MgNi9, accounts for the formation of these secondary compounds during cooling of the melt. However, optimisation of the amount of Mg in the melt and the application of low cooling rates during solidification considerably increases the yield of the La2MgNi9 phase, which is required to achieve enhanced electrochemical properties of the metal hydride battery electrode. The lower alloy solidification front velocity and temperature gradient at the quenching wheel speed of 4.2 m s (1), allow sufficient time for atomic diffusion and interaction of phases during the peritectic reaction and promote the formation of a nearly-homogeneous, single phase La2MgNi9 alloy. (C) 2012 Published by Elsevier B.V.
• Amorphous LaNi thin film electrodes
  作者：Yang Li、Yang-Tse Cheng

  DOI：10.1016/0925-8388(94)01500-7

  日期：1995.5

  Amorphous La-Ni thin films over a wide range of composition were fabricated by electron beam evaporation in ultra-high vacuum. The structure and composition of these films were determined by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron probe microanalysis (EPMA). The reversible hydrogen storage capacity was determined by electrochemical cycling. The equilibrium electrochemical potential of these thin-film electrodes was also measured Versus the change of hydrogen concentration, Delta H/M, in these films. The smallest value among the maximum Delta H/M of these amorphous films is about 0.38, which is still much larger than the one reported in the literature (similar to 0.1). Harris's model for hydrogen absorption in amorphous transition metal alloys is applied to the amorphous La-Ni system. We found that both the La-Ni-3 and the La-2-Ni-2 type of tetrahedral sites can store hydrogen.
• Microstructures and defect structures in intermetallic compounds in the La–Ni alloy system
  作者：H Inui、T Yamamoto、Zhang Di、M Yamaguchi

  DOI：10.1016/s0925-8388(99)00314-x

  日期：1999.12

  Microstructures and defect structures in intermetallic compounds in the La-Ni alloy system have been investigated by transmission electron microscopy in the composition range of La-77.8-83.2 at.%Ni, which corresponds to compositions between two intermetallic phases, La2Ni7 and LaNi5. The intermetallic phase, La5Ni19 of the Ce5Co19-type is found for the first time to exist as an equilibrium phase at a composition between La2Ni7 and LaNi5. This phase is stable at high temperatures around 1000 degrees C but decomposes into La2Ni7 and LaNi5 below 900 degrees C. Numerous stacking-faults are observed on basal planes in La5Ni19 but the density of these basal stacking faults is greatly reduced in La2Ni7. Most stacking faults in La5Ni19 are identified to be of the inter-block layer type while most of those in La2Ni7 are identified to be of the intra-block-layer type. (C) 1999 Elsevier Science S.A. All rights reserved.