کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9594537 | 1507967 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and thermal stability of ceria films supported on YSZ(1 0 0) and α-Al2O3(0 0 0 1)
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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 morphology and reducibility of vapor-deposited ceria films supported on yttria-stabilized zirconia (1 0 0) (YSZ(1 0 0)) and α-Al2O3(0 0 0 1) single crystals were studied using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The results of this study show that the gas environment has a significant effect on the structure of the ceria films on both substrates. CeO2 films on α-Al2O3(0 0 0 1) were found to be stable in a reducing environment at temperatures up to 1000 K, but underwent agglomeration and reaction with the support to form CeAlO3 upon annealing at 1273 K in air. Heating CeO2/YSZ(1 0 0) in air at 1273 K caused the ceria thin film to agglomerate into bar-shaped features which were re-dispersed by subsequent annealing in vacuum. Interactions at the CeO2-YSZ interface were also found to dramatically enhance the reducibility of ceria films supported on YSZ(1 0 0).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 592, Issues 1â3, 1 November 2005, Pages 8-17
Journal: Surface Science - Volume 592, Issues 1â3, 1 November 2005, Pages 8-17
نویسندگان
O. Costa-Nunes, R.M. Ferrizz, R.J. Gorte, J.M. Vohs,