کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
68177 | 48506 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of the “explosive” NOÂ +Â CO reaction on a Pt(1Â 0Â 0) surface by dynamic Monte Carlo simulation
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Study of the “explosive” NOÂ +Â CO reaction on a Pt(1Â 0Â 0) surface by dynamic Monte Carlo simulation Study of the “explosive” NOÂ +Â CO reaction on a Pt(1Â 0Â 0) surface by dynamic Monte Carlo simulation](/preview/png/68177.png)
چکیده انگلیسی
The so-called “surface explosion” observed through TPR experiments in the catalytic reduction of NO by CO on a Pt(1Â 0Â 0) surface is studied by using a dynamic Monte Carlo method on a square lattice at low pressure conditions. This analysis takes into account recent experimental evidences concerning the above reaction on a Rh(1Â 1Â 1) surface; such experiments have shown that the N2 production occurs either from the classical NÂ +Â N recombination step or by the formation and successive decay of a (N-NO)* intermediary species, being the last step the fastest pathway. Moreover, the effect on NO dissociation rate, i.e., the limiting step during the whole reaction, is inhibited by co-adsorbed NO and CO molecules and is enhanced both by the presence of empty sites and adsorbed N atoms as nearest-neighbors. In these simulations the experimental parameter values are included, such as adsorption, desorption and diffusion rates of the reactants. The “explosive” phenomenon is studied in the temperature range of 300-550Â K. In our results, as the surface is totally covered with the adsorbates, cellular structures are observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 281, Issues 1â2, 18 February 2008, Pages 24-34
Journal: Journal of Molecular Catalysis A: Chemical - Volume 281, Issues 1â2, 18 February 2008, Pages 24-34
نویسندگان
S.J. Alas, L. Vicente,