platinum-iridium

• 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
• 英文名称: platinum-iridium
• 英文别名: Iridio-platinum；iridium;platinum
• 化学式: IrPt
• 分子量: 387.3
• InChiKey: HWLDNSXPUQTBOD-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

• 作为反应物：
  描述：

  platinum-iridium 、 copper(II) oxide 、 calcium hydroxide 在 CaF₂ 、 KF 作用下， 以 neat (no solvent, solid phase) 为溶剂， 生成
  参考文献：
  名称：

  Tomaszewska, A.; Mueller-Buschbaum, Hk., Zeitschrift für anorganische und allgemeine Chemie

  摘要：

  DOI：
• 作为产物：
  描述：

  chloropentaammineiridium(III) tetrabromoplatinate 以 neat (no solvent) 为溶剂， 生成 platinum-iridium
  参考文献：
  名称：

  Double complex salts [M(NH3)5Cl][M′Br4] (M = Rh, Ir, Co, Cr, Ru; M′ = Pt, Pd): Synthesis, x-ray diffraction characterization, and thermal properties

  摘要：

  Double complex salts (DCSs) with [M(NH3)(5)Cl](2+) (M = Rh, Ir, Co, Cr, Ru) cations and [PtBr4](2-) anions were prepared in high yields. The salts were two-phase mixtures of the anhydrous and monohydro DCSs. Anhydrous analogues containing [PdBr4](2-) anions with M = Cr or Ru were synthesized. All the compounds were characterized using a set of physicochemical methods. The crystal structure of chloropentaamminechromium(III) tetrabromopalladate(II) was solved: space group Pnma, Z = 4, a = 17.068(2) angstrom, b = 8.315(12) angstrom, c = 9.653(14) angstrom. The [M(NH3)(5)Cl][M'X-4] (M = Rh, Ir, Co, Cr, Ru; M' = Pd, Pt; X = Cl, Br) compounds were shown to be isostructural. The [M(NH3)(5)Cl][PtBr4] center dot H2O monohydrates are isostructural to the [M(NH3)(5)Cl][PdCl4] center dot H2O monohydrates (space group P2(1)/c, z = 4). The properties of the compounds were comparatively analyzed. The tendencies of the thermal stability of the complexes were elucidated. The thermolysis products of the double complex salts obtained under a helium or hydrogen atmosphere were studied.

  DOI：

  10.1134/s0036023606020070

文献信息

• Synthesis and electrochemical study of Pt-based nanoporous materials
  作者：Jingpeng Wang、Peter Holt-Hindle、Duncan MacDonald、Dan F. Thomas、Aicheng Chen

  DOI：10.1016/j.electacta.2008.02.028

  日期：2008.10

  surface areas of these nanoporous Pt-based alloy catalysts are increased by over 68 (Pt–Pd), 69 (Pt–Ru) and 113 (Pt–Ir) fold compared to a polycrystalline Pt electrode. All these synthesized nanoporous electrodes exhibit superb electrocatalytic performance towards electrochemical oxidation of methanol and formic acid. Among the five nanoporous Pt-based electrodes, the Pt–Ir shows the highest peak current

  在目前的工作中，已经通过简便的水热方法在钛基体上直接生长了多种基于Pt的双金属纳米结构材料，包括纳米多孔Pt，Pt-Ru，Pt-Ir，Pt-Pd和Pt-Pb网络。通过扫描电子显微镜，能量色散X射线能谱，X射线光电子能谱，X射线衍射和电化学方法对制成的电极进行表征。与多晶Pt电极相比，这些纳米多孔Pt基合金催化剂的活性表面积增加了68倍以上（Pt–Pd），69（Pt–Ru）和113（Pt–Ir）倍。所有这些合成的纳米孔电极对甲醇和甲酸的电化学氧化均表现出极好的电催化性能。在五个基于Pt的纳米多孔电极中，Pt–Ir在+0处显示出最高的峰值电流密度。50 V，与甲醇氧化的多晶Pt相比，提高68倍，甲酸氧化时提高86倍；而纳米多孔Pt–Pb电极在低电位区域的甲酸氧化催化活性优于其他材料，与+0.15 V的多晶Pt相比，其电流密度提高了280倍。这项研究适用于合成多种双金属和三金属纳米多孔材料，是电
• Electrocatalytic Activity of Nanoporous Pt–Ir Materials toward Methanol Oxidation and Oxygen Reduction
  作者：Peter Holt-Hindle、Qingfeng Yi、Guosheng Wu、Kallum Koczkur、Aicheng Chen

  DOI：10.1149/1.2801987

  日期：——

  electrochemical activity of the different nanoporous PtIr electrodes toward methanol oxidation and oxygen reduction. Our electrochemical studies show that the synthesized nanoporous PtIr electrodes possess extraordinarily high electroactive surface areas and that the presence of Ir significantly improves the electrocatalytic activity of Pt toward the electrochemical oxidation of methanol and the electrochemical

  使用一步简便的水热法制备了具有不同铱含量（Ir%：15、28、40 和 50）的纳米多孔 PtIr 双金属电催化剂。甲醛作为还原剂同时还原Ir 3+ 和Pt 4+ ，形成双金属PtIr纳米多孔结构。使用扫描电子显微镜和能量色散 X 射线光谱来表征合成样品的表面形态和组成。许多电化学方法用于研究不同纳米多孔 PtIr 电极对甲醇氧化和氧还原的电化学活性。我们的电化学研究表明，合成的纳米多孔 PtIr 电极具有非常高的电活性表面积，并且 Ir 的存在显着提高了 Pt 对甲醇电化学氧化和氧电化学还原的电催化活性。在合成的纳米多孔 PtIr 电极中，Pt 60 Ir 40 电极表现出最高的电催化活性。用于甲醇氧化的纳米多孔 Pt 60 Ir 40 电极在 0.6 V 下的稳态电流密度比多晶 Pt 电极高 345 倍，比纳米多孔 Pt 电极高 4 倍以上。Pt 60 Ir 40 电极表现出最高的电催化活性。用于甲醇氧化的纳米多孔
• Complex salts (DienH3)[IrCl6](NO3), (DienH3)[PtCl6](NO3), and (DienH3)[IrCl6]0.5[PtCl6]0.5(NO3): Synthesis, structure, and thermal properties
  作者：E. V. Makotchenko、I. A. Baidina、P. E. Plusnin、L. A. Sheludyakova、Yu. V. Shubin、S. V. Korenev

  DOI：10.1134/s1070328407010071

  日期：2007.1

  The complex salts ((DienH(3))[IrCl6](NO3) (I), (DienH(3))[PtCl6](NO3) (II), and (DienH(3))[IrCl6](0.5) [PtCl6](0.5)(NO3) (III) (where Dien is NH2(CH2)(2)NH(CH2)(2)NH2) were synthesized and characterized by elemental, X-ray diffraction, and thermal analyses and by electronic and IR spectroscopies. Solid solution of the composition Ir0.35Pt0.65 was obtained by decomposition of compound III in the atmosphere of hydrogen.
• Lewis‐Acidic PtIr Multipods Enable High‐Performance Li–O ₂ Batteries
  作者：Yin Zhou、Kun Yin、Qianfeng Gu、Lu Tao、Yiju Li、Hao Tan、Jinhui Zhou、Wenshu Zhang、Hongbo Li、Shaojun Guo

  DOI：10.1002/anie.202114067

  日期：2021.12.13

  AbstractThe sluggish oxygen reaction kinetics concomitant with the high overpotentials and parasitic reactions from cathodes and solvents is the major challenge in aprotic lithium‐oxygen (Li–O2) batteries. Herein, PtIr multipods with a low Lewis acidity of the Pt atoms are reported as an advanced cathode for improving overpotentials and stabilities. DFT calculations disclose that electrons have a strong disposition to transfer from Ir to Pt, since Pt has a higher electronegativity than Ir, resulting in a lower Lewis acidity of the Pt atoms than that on the pure Pt surface. The low Lewis acidity of Pt atoms on the PtIr surface entails a high electron density and a down‐shifting of the d‐band center, thereby weakening the binding energy towards intermediates (LiO2), which is the key in achieving low oxygen‐reduction‐reaction (ORR) and oxygen‐evolution‐reaction (OER) overpotentials. The Li–O2 cell based on PtIr electrodes exhibits a very low overall discharge/charge overpotential (0.44 V) and an excellent cycle life (180 cycles), outperforming the bulk of reported noble‐metal‐based cathodes.
• Pt–Me (Me = Ir, Ru, Ni) binary alloys as an ammonia oxidation anode
  作者：Kazuki Endo、Kyoko Nakamura、Yasushi Katayama、Takashi Miura

  DOI：10.1016/j.electacta.2004.01.025

  日期：2004.6

  Various Pt-Me (Me = It, Ru or Ni) binary alloys were prepared on a glassy carbon (GC) substrate by thermal decomposition and compared as the electrocatalyst for ammonia oxidation in KOH solutions. On the solid solutions of Pt1-xIrx (0 less than or equal to x less than or equal to 1.0) and Pt1-xRux (0 less than or equal to x less than or equal to 0.6), ammonia oxidation was found to begin at a lower potential (-0.6 V versus Ag/AgCl) than on pure Pt by about 0.1 V. During potentiostatic oxidation the current density j decreased considerably within about 300 s. The arbitrarily selected j(60) (j after 60 s) tended to saturate at a high set potential region probably due to the deactivation by a poison of N-ads. The saturated j(60) at a high oxidation potential was apparently higher on Pt(1-x)It(x) (x less than or equal to 0.8) or Pt1-xRux (x less than or equal to 0.4) than on Pt, which suggested a positive cooperation of Ir and Ru with Pt in the electrocatalysis. On the other hand, Ni added as a solute to Pt contributed to lower j(60) with x in Pt1-xNix (0 less than or equal to x less than or equal to 0.7) and did not lower the starting potential of ammonia oxidation at all. The reason why Ir and Ru enhance the activity might be explained by their activity at the dehydrogenatation steps of NH3 at a lower potential, at which ammonia oxidation can never start on the surface of pure Pt. (C) 2004 Elsevier Ltd. All rights reserved.