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)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Structure and thermal stability of ceria films supported on YSZ(1 0 0) and α-Al2O3(0 0 0 1)
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 1–3, 1 November 2005, Pages 8-17
نویسندگان
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