کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
67050 48463 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chromium oxide catalysts for COx-free hydrogen generation via catalytic ammonia decomposition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Chromium oxide catalysts for COx-free hydrogen generation via catalytic ammonia decomposition
چکیده انگلیسی

Chromium oxide nanocrystallites have been synthesized by thermal decomposition of solid precursors and evaluated as catalysts for ammonia decomposition. The physical and chemical properties of Cr2O3 catalysts are characterized by various techniques such as N2 adsorption–desorption isotherms, XRD, TEM, and XPS. The relationship between catalytic activities and physicochemical and electronic properties of Cr2O3 catalysts is investigated. The Cr2O3 catalysts are active for ammonia decomposition and the activity is structure-sensitive with a close relation to particle size. During the ammonia decomposition reaction, N atoms are inserted into the Cr2O3 catalyst thus enhancing the activity of catalyst, due to the variation in the physical, chemical and electronic structures of Cr2O3 catalysts.

Mesoporous chromium oxide catalysts have been synthesized and evaluated for ammonia decomposition. The NH3 decomposition on the Cr2O3 catalysts is structure-sensitive and the most active catalyst has a large particle size. Moreover, interstitial CrNxOy compounds have been found to act as the active sites for the NH3 decomposition.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 304, Issues 1–2, 1 May 2009, Pages 71–76
نویسندگان
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