کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
68603 48518 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of iridium dispersion on the catalytic activity of Ir/SiO2 for the selective reduction of NO with CO in the presence of O2 and SO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Effect of iridium dispersion on the catalytic activity of Ir/SiO2 for the selective reduction of NO with CO in the presence of O2 and SO2
چکیده انگلیسی

The effect of iridium dispersion on the activity of Ir/SiO2 for the selective reduction of NO with CO in the presence of O2 and SO2 has been investigated. The intrinsic activity, expressed in terms of turnover frequency (TOF), increases with decreasing iridium dispersion, indicating that NO reduction with CO over Ir/SiO2 is a structure-sensitive reaction. Characterization of Ir/SiO2 using TPO, XRD and FT-IR spectroscopy following CO adsorption shows that larger iridium crystallites are more difficult to be oxidized and much easier to be reduced under reaction conditions, resulting in the formation of stable iridium metal sites on which NO reduction occurs.

The intrinsic activity, expressed in terms of turnover frequency (TOF), increases with decreasing iridium dispersion, indicating that NO reduction with CO over Ir/SiO2 is a structure-sensitive reaction. Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 256, Issues 1–2, 18 August 2006, Pages 143–148
نویسندگان
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