ceric tetrakis(octyloxide) | 94957-39-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ceric tetrakis(octyloxide)
• CAS: 94957-39-8
• 化学式: C₃₂H₆₈CeO₄
• 分子量: 657.01
• InChiKey: BSSZISKMNINVBE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  11.31
• 重原子数：
  37.0
• 可旋转键数：
  32.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  36.92
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  ammonium cerium (IV) nitrate 在 sodium methylate 作用下， 以 甲醇 、 甲苯 为溶剂， 生成 ceric tetrakis(octyloxide)
  参考文献：
  名称：

  Gradeff, Peter S.; Schreiber, Fred G.; Brooks, Kenneth C., Inorganic Chemistry, 1985, vol. 24, # 7, p. 1110 - 1111

  摘要：

  DOI：

文献信息

• Novel embedded Pd@CeO₂catalysts: a way to active and stable catalysts
  作者：Matteo Cargnello、Tiziano Montini、Stefano Polizzi、Noah L. Wieder、Raymond J. Gorte、Mauro Graziani、Paolo Fornasiero

  DOI：10.1039/b916035c

  日期：——

  1-wt% Pd-CeO2 catalysts were prepared by co-precipitation of Pd nanoparticles with ceria (Pd@CeO2-CP), by a microemulsion procedure (Pd@CeO2-ME), and by normal impregnation of Pd salts (Pd/CeO2-IMP) in order to test the concept that Pd-CeO2 catalysts could be more stable for the water-gas-shift (WGS) reaction when the Pd is embedded in CeO2. Initial WGS rates measured at 250 °C were similar for the Pd@CeO2-CP and Pd/CeO2-IMP, indicating that Pd was accessible for gas-phase reactions on both catalysts. Pd@CeO2-CP exhibited better stability for WGS than did Pd/CeO2-IMP but exposure to the WGS environment at 400 °C still caused a decrease in activity. Physical characterization of the Pd@CeO2-ME implied that the core-shell nanoparticles underwent condensation that resulted in a low surface area and poor Pd accessibility. However, the Pd@CeO2-ME sample exhibited good stability for WGS, suggesting that more effective encapsulation of Pd can limit the sintering of the metal phase, thus resulting in stable catalysts under high temperature reaction conditions.

  通过钯纳米颗粒与铈共沉淀法（Pd@CeO2-CP）、微乳液法（Pd@ -ME）和钯盐普通浸渍法（Pd/ -IMP）制备了 1 wt% Pd- 催化剂，以测试当 Pd 嵌入 时 Pd- 催化剂在水气变换（WGS）反应中更稳定的概念。Pd@ -CP 和 Pd/ -IMP 在 250 °C 时测得的 WGS 初始速率相似，这表明这两种催化剂上的钯都可用于气相反应。与 Pd/ -IMP 相比，Pd@ -CP 对 WGS 的稳定性更好，但暴露在 400 °C 的 WGS 环境中仍会导致活性下降。Pd@ -ME 的物理特性表明，核壳纳米粒子发生了缩聚，导致表面积较低，钯的可及性较差。然而，Pd@ -ME 样品在 WGS 中表现出良好的稳定性，这表明更有效的钯封装可以限制金属相的烧结，从而使催化剂在高温反应条件下保持稳定。