镍,(1:1)混合物和铌 | 12034-55-8

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相过渡金属化合物
• 中文名称: 镍,(1:1)混合物和铌
• 英文名称: nickel niobium
• 英文别名: niobium nickel；nickel;niobium
• CAS: 12034-55-8
• 化学式: NbNi
• 分子量: 151.596
• InChiKey: FEBJSGQWYJIENF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  2
• 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

• 作为产物：
  描述：

  镍 、 铌 以 melt 为溶剂， 生成 镍,(1:1)混合物和铌
  参考文献：
  名称：

  Phase Relations in the Nb-Ni-Sb System

  摘要：

  通过 X 射线衍射研究了 1070 K 下铌-镍-锑体系的相关系。结果证实了三元化合物 Nb28Ni33.5Sb12.5（新结构类型）的存在，该化合物的均匀性范围很窄。三相 Nb-Ni-Sb 样品中 NiSb 和 NbSb2 的结构分析数据证明，该体系不包含基于二元化合物的固溶体。

  DOI：

  10.1007/s10789-005-0281-z

文献信息

• Experimental investigation of phase equilibria in the Nb–Ni–Si refractory alloy system at 1323 K
  作者：Vinícius O. dos Santos、Luiz T.F. Eleno、Cláudio G. Schön、Klaus W. Richter

  DOI：10.1016/j.jallcom.2020.155373

  日期：2020.11

  Abstract Phase equilibria in the Nb–Ni–Si ternary system were experimentally determined at 1323 K and 1473 K using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) techniques. The 1323 K isothermal section of the phase diagram was proposed in combination with previous knowledge of phase stabilities in the system at 1073 K. The results at 1473 K, on the

  摘要 利用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和能量色散光谱 (EDS) 技术，在 1323 K 和 1473 K 下实验确定了 Nb-Ni-Si 三元体系中的相平衡。相图的 1323 K 等温截面是结合先前对 1073 K 系统中相稳定性的知识提出的。另一方面，1473 K 的结果肯定允许识别三种新的金属间化合物相，这些相不存在于较低的温度，这仍然需要进行晶体学表征。发现新相与 Nb5Si3 化合物或富含 Nb 的 bcc 固溶体处于平衡状态，其特点是熔化温度非常高。
• Ni–Nb–O mixed oxides as highly active and selective catalysts for ethene production via ethane oxidative dehydrogenation. Part I: Characterization and catalytic performance
  作者：E HERACLEOUS、A LEMONIDOU

  DOI：10.1016/j.jcat.2005.11.002

  日期：2006.1.1

  catalytic materials based on nickel for the oxidative dehydrogenation of ethane to ethylene. The developed bulk Ni–Nb–O mixed oxides exhibit high activity in ethane ODH and very high selectivity (∼90% ethene selectivity) at low reaction temperature, resulting in an overall ethene yield of 46% at 400 °C. Varying the Nb/Ni atomic ratio led to an optimum catalytic performance for catalysts with Nb/Ni ratio in

  这项工作证明了新型的基于镍的新型催化材料具有将乙烷氧化脱氢为乙烯的巨大潜力。发达的块状Ni-Nb-O混合氧化物在乙烷ODH中表现出高活性，在低反应温度下具有很高的选择性（约90％的乙烯选择性），在400°C时乙烯的总收率为46％。Nb / Ni原子比的变化导致Nb / Ni比在0.11-0.18范围内的催化剂具有最佳的催化性能。使用多种技术（XRD，SEM，TPR，TPD-NH 3，TPD-O 2）对材料进行详细的表征（拉曼，XPS，电导率）表明，将铌引入到NiO中形成的Ni-Nb固溶体是获得优异催化性能的关键成分，这是由于NiO晶格常数的收缩所证明的，因为即使少量的Nb有效地将NiO从总氧化催化剂（对CO 2的选择性为80％）转化为非常有效的乙烷ODH材料。当Nb / Ni比值⩽0.18时，Nb 5+阳离子在NiO晶格中的溶解度最高，Nb含量较高会导致NiO和Nb 2 O 5的不均匀性和
• The atomic structure of a bulk metallic glass resolved by scanning tunneling microscopy and ab-initio molecular dynamics simulation
  作者：R.V. Belosludov、A.I. Oreshkin、S.I. Oreshkin、D.A. Muzychenko、H. Kato、D.V. Louzguine-Luzgin

  DOI：10.1016/j.jallcom.2019.152680

  日期：2020.3

  nano structures. Here we study the atomic structure of a Ni–Nb BMG by means of ultra high vacuum (UHV) STM in local areas of nanometer scale size, and report the direct atomic structure observation supported by ab initio molecular dynamics (MD) and density functional theory (DFT) simulations used to understand the observed structural and electronic features. It was possible to resolve the atomic surface

  摘要 扫描隧道显微镜（STM）技术被广泛用于研究纳米结构的电子和结构特性。在这里，我们通过超高真空 (UHV) STM 在纳米级尺寸的局部区域研究 Ni-Nb BMG 的原子结构，并报告了由 ab initio 分子动力学 (MD) 和密度泛函理论支持的直接原子结构观察(DFT) 模拟用于理解观察到的结构和电子特征。可以解析块状金属玻璃样品的原子表面结构，而 MD 模拟解释了使用 STM 观察到的相对较大的原子间距离。
• The isothermal section of the La–Ni–Nb ternary system at 673K
  作者：Huaiying Zhou、Cuiyun He、Jingqi Liu、Songliu Yuan、Jialin Yan、Junxia Lü

  DOI：10.1016/j.jallcom.2004.06.017

  日期：2005.1

  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, 25 two-phase regions, and 12 three-phases regions. At 673 K, the maximum solid solubilities of Nb in Ni, LaNi5, LaNi7, LaNi3, La7Ni16, and LaNi3 is about 3, 5, 2, 3, 3, and 2 at.% Nb, respectively. The composition range of the Nb in NbNi3 is about from 23.5 to 27 at.% Nb. No ternary compounds were observed. (C) 2004 Elsevier B.V. All rights reserved.
• Nb effect in the nickel oxide-catalyzed low-temperature oxidative dehydrogenation of ethane
  作者：Haibo Zhu、Samy Ould-Chikh、Dalaver H. Anjum、Miao Sun、Gregory Biausque、Jean-Marie Basset、Valérie Caps

  DOI：10.1016/j.jcat.2011.10.005

  日期：2012.1

  A method for the preparation of NiO and Nb-NiO nanocomposites is developed, based on the slow oxidation of a nickel-rich Nb-Ni gel obtained in citric acid. The resulting materials have higher surface areas than those obtained by the classical evaporation method from nickel nitrate and ammonium niobium oxalate. These consist in NiO nanocrystallites (7-13 nm) associated, at Nb contents >3 at.%., with an amorphous thin layer (1-2 nm) of a niobium-rich mixed oxide with a structure similar to that of NiNb2O6. Unlike bulk nickel oxides, the activity of these nanooxides for low-temperature ethane oxidative dehydrogenation (ODH) has been related to their redox properties. In addition to limiting the size of NiO crystallites, the presence of the Nb-rich phase also inhibits NiO reducibility. At Nb content >5 at.%, Nb-NiO composites are thus less active for ethane ODH but more selective, indicating that the Nb-rich phase probably covers part of the unselective, non-stoichiometric, active oxygen species of NiO. This geometric effect is supported by high-resolution transmission electron microscopy observations. The close interaction between NiO and the thin Nb-rich mixed oxide layer, combined with possible restructuration of the nanocomposite under ODH conditions, leads to significant catalyst deactivation at high Nb loadings. Hence, the most efficient ODH catalysts obtained by this method are those containing 3-4 at.% Nb, which combine high activity, selectivity, and stability. The impact of the preparation method on the structural and catalytic properties of Nb-NiO nanocomposites suggests that further improvement in NiO-catalyzed ethane ODH can be expected upon optimization of the catalyst. (C) 2011 Elsevier Inc. All rights reserved.