کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5423615 | 1395796 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation and characterization of Rh-Mo bimetallic layers on the TiO2(1Â 1Â 0) surface
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The investigation of Rh, Mo and Rh-Mo nanosized clusters formed by physical vapor deposition on TiO2(1 1 0) single crystal was performed by X-ray Photoelectron Spectroscopy (XPS), Low Energy Ion Scattering (LEIS) and Auger Electron Spectroscopy (AES). There was no sign for site-exchange between Mo and Rh atoms during deposition of Mo onto Rh particles at 330 K. Mixing between Ti and Mo ions was facilitated at the Mo particle-titania interface due to reaction at 550-700 K. The redox process between titania and Mo deposit was hindered at 330 K by forming predeposited rhodium layer (ÎRh = 2.0 ML), but reached nearly the same extent as without Rh after moderate heating to 600 K. The encapsulation of Rh by titania was complete by about 700 K in the presence of 1.2 ML Mo, in case of Mo-predeposition and Mo-postdeposition as well. Elevating the temperature of TiO2/Rh-Mo layers above 700 K, these metals form alloy at the Mo-Rh interface irrespective of deposition sequences.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 19, 1 October 2009, Pages 2958-2963
Journal: Surface Science - Volume 603, Issue 19, 1 October 2009, Pages 2958-2963
نویسندگان
László Bugyi, László Ãvári, János Kiss,