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题名: Adsorption-desorption behavior of Rh/SiO2 catalyst modified with PPh3 ligand
作者: Zhu, HJ;  Ding, YJ;  Yan, L;  Li, XM;  Xiong, JM;  Pan, ZD;  Jiang, DH;  Lin, LW
关键词: hydroformylation ;  triphenyl phosphine ;  rhodium ;  supported catalyst ;  adsorption-desorption
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2005-10-01
卷: 26, 期:10, 页:884-888
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The temperature-programmed desorption (TPD) was employed to investigate the adsorption-desorption behavior of CO, H-2 and C2H4 on the Rh/SiO2 catalyst modified with PPh3 ligand (PPh3-Rh/SiO2). The result showed that there were three CO desorption peaks at 348, 398 and 525 K on Rh/SiO2, while only one CO desorption peak at 368 K was observed on PPh3-Rh/SiO2. Analogously, only one desorption peak of H-2 and C2H4 appeared on PPh3-Rh/SiO2. These results implied that the adsorption-desorption behavior of CO, H-2 and C2H4 on PPh3-Rh/SiO2 was different from that on Rh/SiO2. The adsorption states of CO on PPh3-Rh/SiO2 were studied using in situ FT-IR technique. The result revealed that the IR absorption peak at 2 040 cm(-1), corresponding to the CO-TPD desorption peak at 368 K on PPh3-Rh/SiO2, was assigned to the linear CO state on the surface PPh3-modified Rh particles. This adsorption-desorption behavior of CO on PPh3-Rh/SiO2 was not only different from that of Rh/SiO2, but also distinguished from that of carbonyl on homogeneous catalysts. The TPD and FT-IR results indicated that the PPh3-Rh/SiO2 had catalytic performance for hydroformylation at lower pressure.
关键词[WOS]: HYDROFORMYLATION ;  OLEFINS
语种: 英语
WOS记录号: WOS:000233264100014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139756
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, Dalian 116023, Peoples R China

Recommended Citation:
Zhu, HJ,Ding, YJ,Yan, L,et al. Adsorption-desorption behavior of Rh/SiO2 catalyst modified with PPh3 ligand[J]. CHINESE JOURNAL OF CATALYSIS,2005,26(10):884-888.
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