Cerium--silver (1/2) | 12349-51-8

• 分子结构分类: 无机化合物 - 无机盐 - 无机银盐
• 英文名称: Cerium--silver (1/2)
• 英文别名: cerium;silver
• CAS: 12349-51-8
• 化学式: Ag₂Ce
• 分子量: 355.856
• InChiKey: HZYQDGWUPIXLGL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  3
• 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：

  氢化铈 (CeH3) 、 银 以 neat (no solvent) 为溶剂， 生成 Cerium--silver (1/2)
  参考文献：
  名称：

  银，铜和铈合金衍生的甲醇合成催化剂的活性和结构与弗罗斯特假设的关系

  摘要：

  根据弗罗斯特的假设，研究了由二元铈-银和三元铈-银-铜金属间化合物前体衍生的体系的结构和甲醇合成活性，该假设认为甲醇合成发生在金属促进的氧化物相上。通过原位粉末X射线衍射（XRD）获得结果，同时通过气相色谱分析出口气流。为了获得广泛的金属/铈氧化物相互作用，研究了在有和没有氢预处理的情况下，在N 2 0和CO / H 2中的活化。使用的压力高达50 bar，温度高达500°C。从Ag / CeO 2中未观察到甲醇合成活性由二元铈银合金衍生的系统。此外，与基于CeCu 2的催化剂相比，基于其铜含量，与三元前体衍生的Cu / Ag催化剂的活性相比预期显着降低。因此，至少对于衍生自这些金属间前体的甲醇合成催化剂而言，过渡金属的身份确实确实至关重要。

  DOI：

  10.1016/0021-9517(90)90060-w

文献信息

• Thermochemistry of some binary alloys of silver with the lanthanide metals by high temperature direct synthesis calorimetry
  作者：S.V Meschel、O.J Kleppa

  DOI：10.1016/j.jallcom.2003.11.160

  日期：2004.8

  The standard enthalpies of formation of some lanthanide silver compounds have been measured by high temperature direct synthesis calorimetry at 1373 +/- 2 K. The following results (in kJ/mol of atoms) are reported: 1: 1 composition-AgTb (-36.5 +/- 2.9); AgDy (-37.3 +/- 1.8); AgEr (-44.9 +/- 3.2); AgTm (-43.0 +/- 2.3); 2:1 composition-Ag2Pr (-24.7 +/- 1 1.6); Ag2Nd (-21.8 +/- 1.9); Ag2Gd (-23.9 +/- 1.6); Ag2Tb (-22.7 +/- 1.8); Ag2Dy (-22.3 +/- 2.3); Ag2Ho (-25.0 +/- 2.3); Ag2Er (-24.0 +/- 2.3); Ag2Tm (-24 +/- 3); Ag2Lu (-25.6 +/- 1.9); 3:1 composition-Ag3Tb (-20.6 +/- 2.0); Ag3Dy (-22.8 +/- 1.9); Ag3Ho (-25.1 +/- 2.0); Ag3Er (-25.4 +/- 2.3); Ag3Tm (-20.2 +/- 2.3). The results are compared with the semi-empirical predicted values of Miedema and coworkers and with the values predicted by Gschneidner for lanthanide alloys. They are also compared with the enthalpies of formation of the Au-LA systems by the present authors. (C) 2003 Elsevier B.V. All rights reserved.
• The equilibrium diagram of the system Ag-50at.%Ce
  作者：Th. Heumann、A. Préval

  DOI：10.1016/0022-5088(80)90028-4

  日期：1980.12
• Interaction of the components in the systems Ce–Ag–Si at 500°C and Eu–Ag–Si at 400°C
  作者：B. Belan、O. Bodak、R. Gladyshevskii、I. Soroka、B. Kuzhel、O. Protsyk、I. Stets

  DOI：10.1016/j.jallcom.2004.12.035

  日期：2005.6

  Isothermal sections of the phase diagrams of the systems Ce-Ag-Si and Eu-Ag-Si were built at 500 and 400 degrees C, respectively. Three intermetallic compounds were found in the former system, two in the latter and their crystal structures and homogeneity regions were determined. The effective valence of europium in the CeAl2Ga2-type phase EuAg2Si2 was found to be 2+ over the whole homogeneity range, based on L-III-absorption spectroscopy. The temperature dependence of the electrical resistivity, thermoelectric power and magnetic susceptibility of this phase was also studied. (c) 2005 Elsevier B.V. All rights reserved.
• Not Just Par for the Course: 73 Quaternary Germanides <i>RE</i>₄<i>M</i>₂<i>X</i>Ge₄ (<i>RE</i> = La–Nd, Sm, Gd–Tm, Lu; <i>M</i> = Mn–Ni; <i>X</i> = Ag, Cd) and the Search for Intermetallics with Low Thermal Conductivity
  作者：Dong Zhang、Anton O. Oliynyk、Gabriel M. Duarte、Abishek K. Iyer、Leila Ghadbeigi、Steven K. Kauwe、Taylor D. Sparks、Arthur Mar

  DOI：10.1021/acs.inorgchem.8b02279

  日期：2018.11.19

  total of 73 new quaternary rare-earth germanides RE4M2XGe4 (RE = rare-earth metal; M = Mn-Ni; X = Ag, Cd) were prepared through reactions of the elements. The solid solution Nd4Mn2Cd(Ge1-ySiy)(4) was also prepared under the same conditions and found to be complete over the entire range. All of these compounds adopt the monoclinic Ho4Ni2InGe4-type structure (space group C2/m, a = 14.2-16.7 angstrom, b = 4.0-4.6 angstrom, c = 6.8-7.5 angstrom, beta = 106-109 degrees), as revealed by powder X-ray diffraction analysis and single-crystal X-ray diffraction analysis on selected members. The structure determination of Nd-4(Mn0.78(1)Ag0.22(1))(2)Ag0.83(1)Ge4 disclosed disorder of Mn and Ag atoms within the tetrahedral site and Ag deficiencies within the square planar site. Within the solid solution Nd4Mn2Cd(Ge1-ySiy)(4), the end-members and two intermediate members were structurally characterized; as the Si content increases, the Cd sites become less deficient and the individual [Mn(2)Tt(2)] layers contract but become further apart from each other. Electronic band structure calculations confirm that the Ag-Ge or Cd-Ge bonds are the weakest in the structure and thus prone to distortion. Thermal property measurements confirm expectations from machine-learning predictions that these quaternary germanides should exhibit low thermal conductivity, which was found to be <10 W m(-1) for Nd4Mn2AgGe4.