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题名: On the preparation of bimetallic Rh-Co hydroformylation catalysts from [Rh(CO)(2)Cl](2) and cobalt carbonyls on the surface of SiO2
作者: Huang, L;  Xu, Y
刊名: BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
发表日期: 1999-02-01
卷: 72, 期:2, 页:199-205
收录类别: SCI ;  CCR
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The preparation of bimetallic Rh-Co catalysts from [Rh(CO)(2)Cl](2) and cobalt carbonyls (Co-2(CO)(8) and Co-4(CO)(12)) on the surface of SiO2 has been investigated by IR spectroscopy and the ethylene hydroformylation reaction. The reaction of Co-2(CO)(8) with [Rh(CO)(2)Cl](2) (Rh:Co = 1:3.5 atomic ratio) yields spontaneously and promptly RhCo3(CO)(12) on the surface. The RhCo3(CO)(12) thus synthesized is characterized by in situ IR monitoring and extraction from the surface into n-hexane. This chemistry parallels that in solution. In n-hexane solution, the reaction proceeds very slowly and is complete after approximately 1 d. The results show that the surface of SiO2 exerts an unusual promoting effect on this organometallic synthesis. When Co-2(CO)(8) is replaced by Co-4(CO)(12), no reaction takes place either in solution or on the surface. However, a bimetallic Rh-Co catalyst may efficiently result from ([Rh(CO)(2)Cl](2) + Co-4(CO)(12))/SiO2 (Rh:Co = 1.3 atomic ratio) by thermal treatment under a reducing atmosphere. In particular, (Rh+ + Co2+)/SiO2 (Rh:Co = 1 :3 atomic ratio) derived from [Rh(CO)(2)Cl](2) and Co-4(CO)(12) likewise may be efficiently transformed to bimetallic Rh-Co clusters or particles under an ethylene hydroformylation atmosphere at 423 K. All the catalysts derived from [Rh(CO)(2)Cl](2) and cobalt carbonyls in this work have catalytic performances close to those of RhCo3(CO)(12)/SiO2 in ethylene hydroformylation.
关键词[WOS]: MEDIATED ORGANOMETALLIC SYNTHESIS ;  HOMOGENEOUS MULTIMETALLIC CATALYSTS ;  VAPOR-PHASE HYDROFORMYLATION ;  RHCO3 CLUSTERS ;  RUTHENIUM ;  <OS(CO)3CL2>2 ;  HYDROGENATION ;  OLEFINS ;  SUPPORT ;  IR
语种: 英语
WOS记录号: WOS:000078973000005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138650
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Huang, L,Xu, Y. On the preparation of bimetallic Rh-Co hydroformylation catalysts from [Rh(CO)(2)Cl](2) and cobalt carbonyls on the surface of SiO2[J]. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN,1999,72(2):199-205.
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