کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
62098 | 47621 | 2009 | 11 صفحه PDF | دانلود رایگان |
Adsorption of various internal electron donors (IDs) and coadsorption of these IDs with TiCl4 on activated MgCl2 have been studied by DRIFT and analytical techniques. As a result, the structures of the ID species on the (1 0 4) and (1 1 0) MgCl2 surfaces were proposed. Based on the ν(CO) band resolution data for the adsorbed ID, it was estimated that the activated MgCl2 surface contains ca. 90% of the five-coordinated Mg cations residing on the (1 0 4) surface and ca. 10% of the four-coordinated Mg cations residing on the (1 1 0) surface. The size of ID molecule was found to influence its adsorption more significantly on the (1 0 4) MgCl2 surface than on the (1 1 0) MgCl2 surface. Coadsorption of the various ID and TiCl4 demonstrated that TiCl4 formed greatly weaker surface complexes than the ID; obviously, upon coadsorption TiCl4 occupies mainly the adsorption sites that are inaccessible for the ID because of steric reasons.
Coadsorption of dibutyl phthalate (DBP) and TiCl4 on the MgCl2 (1 0 4) surface.Figure optionsDownload high-quality image (77 K)Download as PowerPoint slide
Journal: Journal of Catalysis - Volume 266, Issue 1, 15 August 2009, Pages 39–49