کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10244836 | 47706 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Alkali (earth)-doped Au/Al2O3 catalysts for the total oxidation of propene
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
The addition of alkali (earth) metal oxides (MOx, with MÂ =Â Li, Rb, Mg, or Ba) is beneficial for the performance of Au/Al2O3 catalysts in the total oxidation of propene (C3H6). The effect of the MOx additives on the microstructure and nature of Au/Al2O3 catalyst was investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), total surface area (BET), and diffuse reflectance ultraviolet visible spectroscopy (DR-UV/vis). It is found that MOx induces a decrease in the size of gold particles and stabilizes them against sintering. In turn, a direct dependence of the catalytic performance on the size of the gold particles is found. The role of the additives is that of a structural promoter and not a chemical promoter.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 232, Issue 1, 15 May 2005, Pages 96-101
Journal: Journal of Catalysis - Volume 232, Issue 1, 15 May 2005, Pages 96-101
نویسندگان
Andreea Catalina Gluhoi, Nina Bogdanchikova, Bernard E. Nieuwenhuys,