کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5147154 1497383 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
CO selective oxidation using Co-promoted Pt/γ-Al2O3 catalysts
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
CO selective oxidation using Co-promoted Pt/γ-Al2O3 catalysts
چکیده انگلیسی
In this work, alumina-supported platinum catalysts promoted with cobalt were analyzed in the preferential CO oxidation (PROX) reaction. The addition of Co represents a significant catalytic improvement with regard to the monometallic Pt catalyst. This improvement reaches its maximum with a Co/Pt atomic ratio of 1.5. The addition of a higher level of cobalt decreases the activity probably because it would produce the coverage of the Pt active sites, thus inhibiting the adsorption of CO. For all the bimetallic catalysts, the maximum conversion occurs at ca. 130 °C, a value which is within the acceptable working range for this process. A further temperature increase generates a decrease in the CO conversion. The studied catalysts presented a slight deactivation after several hours on stream. The original activity is recovered by submitting the catalysts to a reduction process at 500 °C. Results are explained in terms of TPR, DRS, EXAFS and XANES characterization of the catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 42, 9 November 2016, Pages 19005-19013
نویسندگان
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