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Surface chemistry and catalysis of SiO2-supported RhCo3(CO)(12)

文献类型：期刊论文

作者Huang, L; Liu, AM; Xu, YD
刊名JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
出版日期1997-09-12
卷号124期号:1页码:57-66
关键词Active Sio2-supported RhCo3(Co)(12) Preservation Of Rhco3 Regeneration Of RhCo3(Co)(12) High Activity And Stability Hydroformylation
ISSN号1381-1169
文献子类Article
英文摘要The interaction of the RhCo3 cluster with the SiO2 surface has been investigated via decarbonylation of RhCo3(CO)(12)/SiO2 under different atmospheres by TR spectroscopy. The bimetallic RhCo3 framework is intactly preserved on the surface after thermal treatments of RhCo3(CO)(12)/SiO2 at 623 K under vacuum, hydrogen and oxygen (or air), which is able to regenerate the initial bimetallic carbonyl cluster under a CO atmosphere. In contrast, the RhCo3/SiO2 sample without undergoing any thermal treatment is readily disintegrated by CO to result in Rh+(CO)(2) and Co2+ With the aid of a concerted oxidation by surface OH-. IR study also shows that RhCo3(CO)(12) is reversibly dissociated to Rh-6(CO)(16) and Co-2(CO)(8) on the surface by CO. In situ IR observations reveal that the equilibrium favoring the regeneration of RhCo3(CO)(12) is established at 423 K under atmospheric hydroformylation pressure in terms of the interconversion between the bimetallic cluster and the monometallic clusters, and that RhCo3(CO)(12)/SiO2 is stable and responsible itself for the catalysis toward ethylene hydroformylation. Atmospheric catalytic results illustrate that RhCo3(CO)(12)/SiO2 has high activity and stability for the formation of propanal and n-propanol. (C) 1997 Elsevier Science B.V.
WOS关键词BIMETALLIC CARBONYL CLUSTERS ; CO HYDROGENATION ; OXIDE SUPPORTS ; SPECTROSCOPIC CHARACTERIZATION ; ORGANOMETALLIC CHEMISTRY ; HYDRATED SILICA ; HYDROFORMYLATION ; RHODIUM ; MONOXIDE ; CORH(CO)7
WOS研究方向Chemistry
语种英语
WOS记录号WOS:A1997XY17800006
出版者ELSEVIER SCIENCE BV
源URL[http://cas-ir.dicp.ac.cn/handle/321008/168284]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Huang, L
推荐引用方式
GB/T 7714		 Huang, L,Liu, AM,Xu, YD. Surface chemistry and catalysis of SiO2-supported RhCo3(CO)(12)[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,1997,124(1):57-66.
APA Huang, L,Liu, AM,&Xu, YD.(1997).Surface chemistry and catalysis of SiO2-supported RhCo3(CO)(12).JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,124(1),57-66.
MLA Huang, L,et al."Surface chemistry and catalysis of SiO2-supported RhCo3(CO)(12)".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 124.1(1997):57-66.

入库方式： OAI收割

来源：大连化学物理研究所

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