کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9609887 46540 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Obtaining CeO2-ZrO2 mixed oxides by coprecipitation: role of preparation conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Obtaining CeO2-ZrO2 mixed oxides by coprecipitation: role of preparation conditions
چکیده انگلیسی
The preparation of CeO2-ZrO2 mixed oxides preparation was studied by evaluating the influence of several conditions. Coprecipitation was taken as the standard method and the effects brought about by the cerium salt precursor ((NH4)2Ce(NO3)6 or Ce(NO3)3), the introduction of drying and aging steps as well as pH controlling upon precipitation were analyzed. The samples were characterized by X-ray diffraction, Raman spectroscopy, temperature-programmed reduction, infrared spectroscopy, oxygen storage capacity and surface area. The use of Ce(NO3)3 leads to the formation of c-CeO2 and t-ZrO2 mixed oxide whereas a solid solution is achieved by using (NH4)2Ce(NO3)6. It was observed that the cerium precursor is the most significant parameter of preparation procedure since it defines the crystalline phases and consequently the reducibility behavior of the CeO2-ZrO2 system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 58, Issues 3–4, 28 June 2005, Pages 203-210
نویسندگان
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