کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
52437 46874 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct decomposition of nitrous oxide over Ru/Al2O3 catalysts prepared by deposition–precipitation method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Direct decomposition of nitrous oxide over Ru/Al2O3 catalysts prepared by deposition–precipitation method
چکیده انگلیسی

Alumina-supported ruthenium catalysts were prepared by the deposition–precipitation (DP) and impregnation (IMP) methods. The catalysts were characterized by BET surface area, X-ray diffraction, temperature-programmed reduction (TPR) and diffused reflectance infra-red spectroscopic (DRIFTS) techniques. The DP catalysts showed higher activity than their IMP analogues. The DRIFTS analysis revealed preferential formation of Run+ species on the surface of DP catalysts. Both Run+ and Ru0 species appeared on IMP catalysts, with the composition of Ru0 increasing with increase in metal loading. The temperatures at which the peak maxima appeared were higher in the TPR patterns of the DP catalysts, indicating greater interaction between Ru and alumina, which explained the formation of the cationic Ru species. The high activity of the catalysts prepared by DP method was related to the formation of electron deficient Ru sites during the preparation of the catalyst.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 8, Issue 9, September 2007, Pages 1406–1410
نویسندگان
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