کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426022 1395872 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cluster size effects on hydrazine decomposition on Irn/Al2O3/NiAl(1 1 0)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Cluster size effects on hydrazine decomposition on Irn/Al2O3/NiAl(1 1 0)
چکیده انگلیسی

A series of planar model catalysts were prepared by deposition of size-selected Irn+ on Al2O3/NiAl(1 1 0), and hydrazine decomposition chemistry was used to probe their size-dependent chemical properties. Small Irn (n ⩽ 15) on Al2O3/NiAl(1 1 0) are able to induce hydrazine decomposition at temperatures well below room temperature, with significant activity first appearing at Ir7. Both activity and product branching are strongly dependent on deposited cluster size, with these small clusters supporting only the simplest decomposition mechanism: dehydrogenation and N2 desorption at low temperatures, followed by H2 recombinative desorption at temperatures above 300 K. For Ir15, we begin to see ammonia production, signaling the onset of a transition to clusters able to support more complex chemistry.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 2, 15 January 2006, Pages 461-467
نویسندگان
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