کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10244429 | 47685 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of the interfacial structure of a Pt/α-Al2O3 model catalyst under high-temperature hydrogen reduction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We investigated the interface structure between the Pt nanoparticles and the alumina support in a Pt/Al2O3 model catalyst reduced in flowing hydrogen gas at different temperatures by cross-sectional atomic-resolution transmission electron microscopy nanodiffraction techniques. An interfacial Pt8Al21 alloy with a tetragonal structure was formed at the Pt-alumina interface during the high-temperature reduction at 1073 K. This alloy phase was not formed when the Pt/Al2O3 model catalyst was reduced at 773 K. The platinum-assisted reduction of the alumina support and the subsequent strong metal-support interaction at the interface may be responsible for the formation of the interfacial alloy phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 236, Issue 1, 15 November 2005, Pages 9-13
Journal: Journal of Catalysis - Volume 236, Issue 1, 15 November 2005, Pages 9-13
نویسندگان
Xiaoyan Zhong, Jing Zhu, Jingyue Liu,