کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
52238 | 46867 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Catalytic combustion of methane over cobalt doped lanthanum stannate pyrochlore oxide
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
A series of La2CoxSn2−xO7−δ oxides with pyrochlore structure have been synthesized by the co-precipitation method as high-temperature catalysts for methane combustion. The dopant strongly influences the thermal stability and redox properties of these pyrochlores. IR measurements show that the Sn–O bond strength was weakened with increasing amount of Co doped in the La2Sn2O7, thus promoting the formation of oxygen vacancy. The reduction rates and the amount of oxygen vacancy would significantly affect catalytic activities of La2CoxSn2−xO7−δ in CH4 oxidation. Among the doped pyrochlores, La2Co0.3Sn1.7O7−δ and La2Co0.5Sn1.5O7−δ possessed optimum activities for methane combustion at low and high temperature, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 690–695
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 690–695
نویسندگان
Jie Cheng, Hailin Wang, Zhengping Hao, Shaobin Wang,