Chem. J. Chinese Universities ›› 2001, Vol. 22 ›› Issue (2): 280.
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GAO Jian, ZHONG Shun-He
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Abstract: Silica supported dinuclear complex catalyst was prepared by SiO2 surface modification and metal anchoring, namely Cu2(OAc)2/SiO2. The chemical composition, bonding fashion of the bridging ligand and coordination environment of the metal ions on the SiO2 surface were characterized by titration method, IRand UV-Vis analysis.The catalyst mode as a whole was given by the illumination of the formation of the catalyst. The absorption properties of catalyst Cu2(OAc)2/SiO2 to molecules CO2 and EO (ethylene oxide) were studied by molecule probing IRand TPDtechniques. Experimental results indicated that the CO2 and EOwere chemisorbed and bridging absorption structures were formed between the two copper (Ⅱ) ions. TPD-MSexperiments established that CO2 and EOdesorbed from the surface of the catalyst at 120 ℃ and 130 ℃ respectively. Catalytic reaction properties for the synthesis of EC (ethylene carbonate) from CO2 and EOwas studied by TPSR-IRon line technique, indicating that the reaction could undertake at 120 ℃ and low pressure.
Key words: Dinuclear complex, Supported complex catalyst, Chemisorption of CO2, Chemisorption of ethylene oxide, Synthesis of ethylene carbonate
CLC Number:
O643.32
TrendMD:
GAO Jian, ZHONG Shun-He . Synthesis and Characterization of Supported Complex Catalyst Cu2(OAc)2/SiO2──TPD,In situ-IR Study for Synthesis of EC by Activation of CO2 and EO[J]. Chem. J. Chinese Universities, 2001, 22(2): 280.
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http://www.cjcu.jlu.edu.cn/EN/Y2001/V22/I2/280
