rubidium niobate | 12059-51-7

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 过渡金属有机体
• 英文名称: rubidium niobate
• 英文别名: oxido(dioxo)niobium;rubidium(1+)
• CAS: 12059-51-7
• 化学式: NbO₃*Rb
• 分子量: 226.372
• InChiKey: VSMYVMWMKWZYQD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -4.43
• 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：
  57.2
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  rubidium acetate 、 五氯化铌 在 柠檬酸 作用下， 以 水 、 双氧水 为溶剂， 生成 rubidium niobate
  参考文献：
  名称：

  Catalytic oxidation of soot over alkaline niobates

  摘要：

  The lack of studies in the current literature about the assessment of alkaline niobates as catalysts for soot oxidation has motivated this research. In this study, the synthesis, characterization and assessment of alkaline metal niobates as catalysts for soot combustion are reported. The solids MNbO3 (M = Li, Na, K, Rb) are synthesized by a citrate method, calcined at 450 degrees C, 550 degrees C, 650 degrees C, 750 degrees C, and characterized by AAS, N-2 adsorption, XRD, O-2-TPD, FTIR and SEM. All the alkaline niobates show catalytic activity for soot combustion, and the activity depends basically on the nature of the alkaline metal and the calcination temperature. The highest catalytic activity, expressed as the temperature at which combustion of carbon black occurs at the maximum rate, is shown by KNbO3 calcined at 650 degrees C. At this calcination temperature, the catalytic activity follows an order dependent on the atomic number, namely: KNbO3 > NaNbO3 > LiNbO3. The RbNbO3 solid do not follow this trend presumably due to the perovskite structure was not reached. The highest catalytic activity shown by of KNbO3, despite the lower apparent activation energy of NaNbO3, stress the importance of the metal nature and suggests the hypothesis that K+ ions are the active sites for soot combustion. It must be pointed out that alkaline niobate subjected to consecutive soot combustion cycles does not show deactivation by metal loss, due to the stabilization of the alkaline metal inside the perovskite structure. (C) 2012 Elsevier B. V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2012.10.015

文献信息

• ANTOXINA, T. F.;SERGIENKO, V. I.;SAVCHENKO, N. N.
  作者：ANTOXINA, T. F.、SERGIENKO, V. I.、SAVCHENKO, N. N.

  DOI：——

  日期：——
• Catalytic oxidation of soot over alkaline niobates
  作者：G. Pecchi、B. Cabrera、A. Buljan、E.J. Delgado、A.L. Gordon、R. Jimenez

  DOI：10.1016/j.jallcom.2012.10.015

  日期：2013.2

  The lack of studies in the current literature about the assessment of alkaline niobates as catalysts for soot oxidation has motivated this research. In this study, the synthesis, characterization and assessment of alkaline metal niobates as catalysts for soot combustion are reported. The solids MNbO3 (M = Li, Na, K, Rb) are synthesized by a citrate method, calcined at 450 degrees C, 550 degrees C, 650 degrees C, 750 degrees C, and characterized by AAS, N-2 adsorption, XRD, O-2-TPD, FTIR and SEM. All the alkaline niobates show catalytic activity for soot combustion, and the activity depends basically on the nature of the alkaline metal and the calcination temperature. The highest catalytic activity, expressed as the temperature at which combustion of carbon black occurs at the maximum rate, is shown by KNbO3 calcined at 650 degrees C. At this calcination temperature, the catalytic activity follows an order dependent on the atomic number, namely: KNbO3 > NaNbO3 > LiNbO3. The RbNbO3 solid do not follow this trend presumably due to the perovskite structure was not reached. The highest catalytic activity shown by of KNbO3, despite the lower apparent activation energy of NaNbO3, stress the importance of the metal nature and suggests the hypothesis that K+ ions are the active sites for soot combustion. It must be pointed out that alkaline niobate subjected to consecutive soot combustion cycles does not show deactivation by metal loss, due to the stabilization of the alkaline metal inside the perovskite structure. (C) 2012 Elsevier B. V. All rights reserved.