中文摘要：

在相同Rh担载量和P/Rh摩尔比的条件下,使用壳型催化剂制备技术制备了具有不同Rh粒径的锚合膦配体修饰的Rh/SiO2催化剂,以乙烯氢甲酰化反应作为探针反应考察了催化剂的反应性能.结果表明,Rh粒径直接影响催化剂的催化性能：Rh粒径越小,催化剂活性越高,但诱导期越长.通过H2化学吸附、透射电子显微镜、N2吸附-脱附等温线、原位红外光谱和固体~（31）P核磁共振技术对催化剂进行了表征,结果表明,随着Rh粒径的减小,活性物种铑膦配合物增多,但有效载体面积上的Rh颗粒浓度降低,使膦需要更多的时间和Rh配位形成配合物,从而导致诱导期增长.

英文摘要：

A series of tethered-phosphine modified Rh/SiO2 catalysts with different Rh particle size was prepared by preparation technology of shell-type catalyst,which shared the same Rh loading and P / Rh ratio.Ethylene hydroformylation was used as a probe reaction to test the performance of those catalysts. The results show that Rh particle size has a great effect on the performances of phosphine modified Rh/SiO2 catalysts. The catalytic activity increased as Rh particle size decreased,but meanwhile the induction period prolonged. The catalysts were characterized by H2 chemical adsorption,transmission electron microscope,N2 adsorptiondesorption isotherms,in situ Fourier-transform spectra and solid31 P nuclear magnetic resonance technology.The active species were Rh-phosphine complex,and more amount of active species were produced over catalyst with smaller Rh particle size. With the decreasing of Rh particle size,the density of Rh particle on the surface decreased and it took more time for DPPPTS to reach Rh and form Rh-phosphine complex.