cobalt-rhodium | 154104-28-6

• 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: cobalt-rhodium
• 英文别名: rhodium-cobalt；Cobalt--rhodium (1:1)；cobalt;rhodium
• CAS: 154104-28-6
• 化学式: CoRh
• 分子量: 161.899
• InChiKey: SUCYXRASDBOYGB-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

• 作为产物：
  描述：

  以 neat (no solvent) 为溶剂， 生成 cobalt-rhodium
  参考文献：
  名称：

  Bimetallic Rh-Co/ZrO2 catalysts for ethanol steam reforming into hydrogen-containing gas

  摘要：

  The properties of supported bimetallic Rh-Co/ZrO2 catalysts in ethanol steam reforming into hydrogen-containing gas were studied. The particles of Rh-Co solid solutions on the catalyst surface were prepared by the thermal decomposition of the double complex salt [Co(NH3)(6)][Rh(NO2)(6)] and the solid solution Na-3[RhCo(NO2)(6)]. It was found that the bimetallic Rh-Co/ZrO2 catalysts exhibited high activity in the reaction of ethanol steam reforming. The equilibrium composition of reaction products was attained at 500-700A degrees C and a reaction mixture space velocity of 10000 h(-1).

  DOI：

  10.1134/s0023158410060157
• 作为试剂：
  描述：

  苯甲醇 、 alkaline earth salt of/the/ methylsulfuric acid 在 cobalt-rhodium 氢气 作用下， 以 水 为溶剂， 生成 苯乙醇 、 苯乙醛 、 甲苯
  参考文献：
  名称：

  在苯甲醇的同系化中选择性形成 2-苯乙醇

  摘要：

  使用钴-钌混合催化剂在苯甲醇的同系化中获得了高选择性的 2-苯基乙醇 (87%)。通过在低反应温度下加入水来抑制甲苯作为主要副产物的形成。溴化物作为促进剂比氯化物或碘化物更有效。从原位 IR 观察，发现 [Co(CO)4]- 是同系化的活性物质，是由 [CoH(CO)4] 的解离产生的，而不是由 [Co2(CO) 的歧化产生的8] 在所用的反应温度 (120 °C) 下。还揭示了作为预催化剂的氯化钌在同系化条件下转化为钌的溴羰基络合物。

  DOI：

  10.1246/bcsj.59.2565

文献信息

• Rhodium-Cobalt Bimetallic Nanoparticles: A Catalyst for Selective Hydrogenation of Unsaturated Carbon-Carbon Bonds with Hydrous Hydrazine
  作者：Jin Lin、Jing Chen、Weiping Su

  DOI：10.1002/adsc.201200576

  日期：2013.1.14

  compositions on the catalytic activity of the rhodium‐based bimetallic nanocatalysts revealed that the nanoparticles with a 4:1 ratio of rhodium to cobalt, were more active than the rhodium monometallic nanoparticles in the selective hydrogenation of unsaturated carbon‐carbon bonds with hydrous hydrazine as a hydrogen source. The nanocatalysts effected this hydrogenation process in good‐to‐excellent yields with

  我们对金属成分对铑基双金属纳米催化剂催化活性影响的研究表明，在不饱和碳原子选择性加氢中，铑与钴比率为4：1的纳米颗粒比铑单金属纳米颗粒更具活性。与水合肼作为氢源的碳键。纳米催化剂以高至优异的收率和较高的官能团耐受性影响了该氢化过程，可重复使用10次而不会损失催化活性。X射线光电子能谱，透射电子显微镜和线扫描分析法对催化剂的表征表明，金属铑和钴的共存在增强催化活性方面起着重要作用。
• Iodide-mediated templating synthesis of highly porous rhodium nanospheres for enhanced dehydrogenation of ammonia borane
  作者：Houbing Zou、Bo Jin、Runwei Wang、Yanbo Wu、Hengquan Yang、Shilun Qiu

  DOI：10.1039/c8ta09077g

  日期：——

  A novel iodide-mediated templating strategy has been developed for preparing highly porous rhodium nanospheres (HPRhS) with exceptionally high surface area and controllable nanoporous structures, which showed a remarkable catalytic activity and stability in methanolytic dehydrogenation of ammonia borane.

  一种新型的碘化物介导的模板策略已经被开发出来，用于制备高度多孔的铑纳米球（HPRhS），其具有异常高的表面积和可控的纳米孔结构，表现出在氨硼烷的甲醇脱氢反应中显着的催化活性和稳定性。
• Tailoring the activity and selectivity of Rh/SiO₂ for the selective hydrogenation of phenol by CoO_<i>x</i> promotion
  作者：Fei Zhang、Chunzheng Wu、Shuibo Wang、Shiwei Wang、Tong Li、Laixi Zou、Hongbo Yu、Hongfeng Yin

  DOI：10.1039/d1cy02324a

  日期：——

  supported Rh nanoparticles (NPs) are one of the best catalysts for the selective hydrogenation of phenol to cyclohexanol, they still suffer from poor selectivity problems. In this study, we promoted the selectivity of Rh NPs with CoOx through an in situ transformation of the bimetallic RhCo NPs on SiO2. Among the obtained Rh–CoOx/SiO2 catalysts, the one with a Co/Rh molar ratio of 1/3 exhibited the

  尽管负载型 Rh 纳米粒子 (NPs) 是苯酚选择性加氢制环己醇的最佳催化剂之一，但它们仍然存在选择性差的问题。在这项研究中，我们通过在 SiO 2上原位转化双金属 RhCo NPs 来提高 Rh NPs 与 CoO x的选择性。在得到的Rh-CoO x /SiO 2催化剂中，Co/Rh 摩尔比为1/3 的催化剂表现出最高的苯酚转化率（即98.1%）和对环己醇的最高选择性（即99.4%）。我们的研究表明，CoO x促进剂改变了Rh的电子态，在其界面上产生了新的活性位点，有利于苯酚的活化和环己醇的解吸。然而，由于Rh-CoO x界面的暴露较少， CoO x对Rh 的过度覆盖会导致失活。
• Structural study of bimetallic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Co</mml:mi></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Rh</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>nanoparticles: Size and composition effects
  作者：M. C. Fromen、P. Lecante、M. J. Casanove、P. Bayle Guillemaud、D. Zitoun、C. Amiens、B. Chaudret、M. Respaud、R. E. Benfield

  DOI：10.1103/physrevb.69.235416

  日期：——

  The structure of ultrafine bimetallic CoxRh1-x nanoparticles synthesized in mild conditions by codecomposition of organometallic precursors in the presence of a polymer or a ligand has been studied using high-resolution electron microscopy and wide-angle x-ray scattering techniques. While pure rhodium particles exhibit the main structural features of a face centered cubic (fcc), alloying with cobalt induces a progressive loss of periodicities, leading in high-cobalt-content particles to a polytetrahedral structure close to the one already encountered in pure-cobalt particles. When increasing the synthesis temperature, the polytetrahedral structure remains remarkably stable, while particles with higher rhodium content clearly evolve towards perfect fcc. Increasing the size of the particles up to 5-6 nm stabilizes the structural phases encountered in the phase diagram of the bulk alloy. Different element-sensitive techniques, x-ray absorption spectroscopy (XANES and EXAFS) and energy-filtering transmission electron microscopy, have also been implemented in order to get chemical information. Evidence is given for a cobalt surface segregation in these bimetallic particles, highly favorable for magnetic-moment enhancement.
• Synthesis and Magnetism of Co<i>_x</i>Rh₁<i>_-</i><i>_x</i> and Co<i>_x</i>Ru₁<i>_-</i><i>_x</i> Nanoparticles
  作者：D. Zitoun、C. Amiens、B. Chaudret、M.-C. Fromen、P. Lecante、M.-J. Casanove、M. Respaud

  DOI：10.1021/jp034215h

  日期：2003.7.1

  The simultaneous decomposition of Co(cycloctenyl)(COD) (COD: 1,5-cyclooctadiene) and Rh(Acac)(COD) (Acac: acetylacetonate) or Ru(COD)(COT) (COT: 1,3,5-cyclooctatriene) in mild conditions of temperature and pressure leads, in the presence of a polymer (poly(vinylpyrrolidone)), to spherical nanoparticles (NPs), well dispersed and isolated in the organic matrix. All samples display a mean diameter of about 2 nm and a narrow size distribution. Structural investigations by high-resolution electron microscopy (HRTEM) and wide-angle X-ray scattering (WAXS) as well as magnetization measurements by SQUID magnetometry demonstrate the formation of bimetallic alloyed nanoparticles of defined compositions. Cobalt-rich nanocrystals adopt an unusual non periodic polytetrahedral structure while the 4d metal-rich samples display the main features of the bulk structure. More interestingly, the magnetic data evidence a strong enhancement of the magnetic moment per atom compared to bulk values. The coercive field compared to Co monometallic NPs increases strongly with the 4d metal ratio. The alloying with 4d metals is then presented as a precise tool to tune the magnetic properties of nanomagnets and to get softer or harder magnetic materials with high magnetization. The origin of these unusual properties will be discussed in relation with the synthesis conditions and the structure of the NPs.