Pd2Ga | 69847-95-6

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: Pd2Ga
• 英文别名: Gallium--palladium (1/2)；gallane;palladium
• CAS: 69847-95-6
• 化学式: GaPd₂
• 分子量: 282.563
• InChiKey: QUACPOUMYKAVKB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.19
• 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：

  氢化镓 、 钯 以 neat (no solvent) 为溶剂， 生成 Pd2Ga
  参考文献：
  名称：

  高温直接合成量热法测定 Pd2Ga 和 PdGa 的标准生成焓

  摘要：

  摘要 PdGa 和 Pd 2 Ga 的标准生成焓已通过高温直接合成量热法在 (1473 ± 2) K 下确定。 Δ f H 0 以 kJ（原子摩尔数） -1 为单位的以下值被报道：钯 (-71.6 ± 2.3); Pd 2 Ga (-64.4 ± 2.0)。将结果与报告的量热数据和 Miedema 等人的半经验模型的预测值进行比较。

  DOI：

  10.1016/s0040-6031(97)00019-1
• 作为试剂：
  描述：

  乙炔 在 Pd2Ga 、 氢气 作用下， 200.0 ℃ 、800.01 kPa 条件下， 生成 乙烷 、 乙烯
  参考文献：
  名称：

  GaPd2和GaPd上乙炔选择性加氢的动力学参数。

  摘要：

  金属间化合物GaPd 2是乙炔半加氢的高度选择性和稳定的催化剂。为了更深入地了解这种催化材料上的选择性加氢，基本的反应动力学知识是必不可少的。迄今为止，尚未发表关于具有分离的活性位点的定义明确的金属间催化剂的该反应的实验动力学数据。动力学测量在140–200°C下进行，发现表观活化能为29（2）kJ mol -1。砷化镓2示出的是第一二元催化剂材料，其在200°C下相对于乙炔显示正反应级（0.89）。乙炔转化率，比活度和对乙烯，乙烷和高级烃的选择性的影响是通过按照实验方法设计的2 4阶乘实验确定的。温度和压力对这些值的影响最大。结果允许实现高乙烯收率的最佳操作。将GaPd 2的反应动力学与获得的GaPd实验结果进行比较，可以发现H 2和C 2 H 2在两种化合物上的反应顺序不同。

  DOI：

  10.1002/cphc.201700535

文献信息

• Determination of the standard enthalpies of formation of Pd2Ga and PdGa by high-temperature direct synthesis calorimetry
  作者：S.V. Meschel、O.J. Kleppa

  DOI：10.1016/s0040-6031(97)00019-1

  日期：1997.5

  Abstract The standard enthalpies of formation of PdGa and Pd 2 Ga have been determined by high-temperature direct synthesis calorimetry at (1473 ± 2) K. The following values of Δ f H 0 in kJ (mol of atoms) −1 are reported: PdGa (−71.6 ± 2.3); Pd 2 Ga (−64.4 ± 2.0). The results are compared with reported calorimetric data and with predicted values from the semi-empirical model of Miedema et al.

  摘要 PdGa 和 Pd 2 Ga 的标准生成焓已通过高温直接合成量热法在 (1473 ± 2) K 下确定。 Δ f H 0 以 kJ（原子摩尔数） -1 为单位的以下值被报道：钯 (-71.6 ± 2.3); Pd 2 Ga (-64.4 ± 2.0)。将结果与报告的量热数据和 Miedema 等人的半经验模型的预测值进行比较。
• Synthesis and Catalytic Properties of Nanoparticulate Intermetallic Ga–Pd Compounds
  作者：Marc Armbrüster、Gregor Wowsnick、Matthias Friedrich、Marc Heggen、Raul Cardoso-Gil

  DOI：10.1021/ja202869d

  日期：2011.6.15

  A two-step synthesis for the preparation of single-phase and nanoparticulate GaPd and GaPd2 by coreduction of ionic metal-precursors with LiHBEt3 in THF without additional stabilizers is described. The coreduction leads initially to the formation of Pd nanop articles followed by a Pd-mediated reduction of Ga3+ on their surfaces, requiring an additional annealing step. The majority of the intermetallic particles have diameters of 3 and 7 nm for GaPd and GaPd2, respectively, and unexpected narrow size distributions as determined by disk centrifuge measurements. The nanoparticles have been characterized by XRD, TEM, and chemical analysis to ensure the formation of the intermetallic compounds. Unsupported nanoparticles possess high catalytic activity while maintaining the excellent selectivity of the ground bulk materials in the semihydrogenation of acetylene. The activity could be further increased by depositing the particles on alpha-Al2O3.
• Phase equilibria in the palladium-rich part of the gallium–palladium system. The crystal structures of Ga3Pd7 and Ga1−xPd2+x
  作者：Christoph Wannek、Bernd Harbrecht

  DOI：10.1016/s0925-8388(00)01511-5

  日期：2001.3

  The phase relations between the palladium-rich phases of the gallium-palladium system are clarified by combining preparative methodologies with powder X-ray diffraction and thermochemical analyses. A modified phase diagram of the palladium-rich part of the system is presented. The structure of Ga3Pd7, decomposing peritectoidally at 881(2)degreesC, was determined by powder X-ray diffraction and refined by a Rietveld profile fit. Ga3Pd7 adopts a new structure type with monoclinic space group symmetry: C2/m, Z = 2, a = 1359.46(2) pm, b=405.510(5) pm, c=544.339(6) pm, beta =105.2219(7)degrees, wR(p) = 0.082. The structure can be seen as a strongly distorted, ordered variant of a respective GaxPd1-x fcc solid solution. It comprises two structural motifs: layers of columns of fused (GaPd6/2)(2) prisms are formally separated by equiatomic GaPd layers. The impact of the composition on the structure of Co2Si-type Ga1-xPd2+x was studied. There exists a symmetry relation between the cubic close-packed arrangement of atoms and the structures of the Co2Si-type branch of AB(2) phases with Pearson symbol oP12 and space group symmetry Pnma. (C) 2001 Elsevier Science B.V. All rights reserved.
• Hydrogenation of palladium rich compounds of aluminium, gallium and indium
  作者：H. Kohlmann

  DOI：10.1016/j.jssc.2009.11.029

  日期：2010.2

  Palladium rich intermetallic compounds of aluminium, gallium and indium have been Studied before and after hydrogenation by powder X-ray diffraction and during hydrogenation by in situ thermal analysis (DSC) at hydrogen gas pressures up to 39 MPa and temperatures Lip to 700 K. Very weak DSC signals and small unit cell increases of below 1% for AlPd(2), AlPd(3), GaPd(2), Ga(5)Pd(13), ln(3)Pd(5), and InPd(2) suggest negligible hydrogen uptake. In contrast, for both tetragonal modifications of InPd(3) (ZrAl(3) and TiAl(3) type), heating to 523 K at 2 MPa hydrogen pressure leads to a rearrangement of the intermetallic structure to a cubic AuCu(3) type with an increase in unit cell Volume per formula unit by 3.6-3.9%. Gravimetric analysis suggests a composition InPd(3)H(approximate to 0.8) for the hydrogenation product. Very similar behaviour is found for the deuteration of InPd(3). (C) 2009 Elsevier Inc. All Fights reserved.
• Kinetic Parameters for the Selective Hydrogenation of Acetylene on GaPd₂and GaPd
  作者：René R. Zimmermann、Tobias Hahn、Wladimir Reschetilowski、Marc Armbrüster

  DOI：10.1002/cphc.201700535

  日期：2017.9.20

  stable catalyst for the semi‐hydrogenation of acetylene. Knowledge of the underlying reaction kinetics is essential to gain a deeper understanding of the selective hydrogenation on this catalytic material. To date, there has been no experimental kinetic data published for this reaction on a well‐defined intermetallic catalyst possessing isolated active sites. Kinetic measurements are performed at 140–200 °C

  金属间化合物GaPd 2是乙炔半加氢的高度选择性和稳定的催化剂。为了更深入地了解这种催化材料上的选择性加氢，基本的反应动力学知识是必不可少的。迄今为止，尚未发表关于具有分离的活性位点的定义明确的金属间催化剂的该反应的实验动力学数据。动力学测量在140–200°C下进行，发现表观活化能为29（2）kJ mol -1。砷化镓2示出的是第一二元催化剂材料，其在200°C下相对于乙炔显示正反应级（0.89）。乙炔转化率，比活度和对乙烯，乙烷和高级烃的选择性的影响是通过按照实验方法设计的2 4阶乘实验确定的。温度和压力对这些值的影响最大。结果允许实现高乙烯收率的最佳操作。将GaPd 2的反应动力学与获得的GaPd实验结果进行比较，可以发现H 2和C 2 H 2在两种化合物上的反应顺序不同。