کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9623821 | 456589 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of preparation methods on the structure and redox behavior of platinum-ceria-zirconia catalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of preparation methods on the structure and redox behavior of platinum-ceria-zirconia catalysts Effect of preparation methods on the structure and redox behavior of platinum-ceria-zirconia catalysts](/preview/png/9623821.png)
چکیده انگلیسی
Platinum was introduced into ceria-zirconia solid solutions to form nominal Ce0.66Zr0.32Pt0.02O2 solid solutions by sol-gel. It was found that, through sol-gel method, the Pt ions could be inserted into the ceria lattice according to the results of XRD, XPS and TPR analyses. This brought about a different synergistic effect between the Pt and Ce components in Ce0.66Zr0.32Pt0.02O2 compared with the Pt/Ce0.67Zr0.33O2 system prepared by traditional impregnation, such as increased the oxygen mobility in ceria-zirconia solid solutions and improved the stability of metallic state for platinum at high temperature. The lower surface Pt content leads to a worse three-way catalytic activity over the Pt-doped sample at low temperature. However, it features a better thermal stability after aging at 950 °C for 20 h, implying a self-generation mechanism of noble metals. This, in return, provides this material with a potential to be used in eliminating pollutants from auto exhaust.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 109, Issues 1â3, 1 May 2005, Pages 133-139
Journal: Chemical Engineering Journal - Volume 109, Issues 1â3, 1 May 2005, Pages 133-139
نویسندگان
Xiaodong Wu, Jun Fan, Rui Ran, Duan Weng,