کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9595133 1507983 2005 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics of ammonia oxidation on stepped platinum surfaces
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Kinetics of ammonia oxidation on stepped platinum surfaces
چکیده انگلیسی
A mean field model is presented describing the kinetics of ammonia oxidation with oxygen on two stepped Pt(1 1 1) surfaces, Pt(5 3 3) and Pt(4 4 3), under low pressure conditions (p < 10−3 mbar). It is shown that the experimental data of both surfaces can be simulated with good agreement with a strongly simplified mechanism which neglects NHx (x = 1, 2) intermediates and contains direct H abstraction from NH3 by adsorbed oxygen as essential step. The model works quantitatively in excess of oxygen, but with ammonia being in excess the agreement worsens.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 576, Issues 1–3, 10 February 2005, Pages 131-144
نویسندگان
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