کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
61732 47601 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bridging the materials gap between single crystal and supported catalysts using polycrystalline Ni/Pt bimetallic surfaces for cyclohexene hydrogenation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Bridging the materials gap between single crystal and supported catalysts using polycrystalline Ni/Pt bimetallic surfaces for cyclohexene hydrogenation
چکیده انگلیسی

The current work utilizes the adsorption of hydrogen and the hydrogenation of cyclohexene as probe reactions to bridge the materials gap between single crystal and polycrystalline Ni/Pt bimetallic surfaces. Previous studies on Ni-modified Pt(1 1 1) have identified the formation of a Pt–Ni–Pt(1 1 1) subsurface structure that binds atomic hydrogen and cyclohexene more weakly, leading to a low-temperature hydrogenation pathway not present on either of the parent metal surfaces. In the current work, the Pt–Ni–Pt subsurface structure is prepared by depositing Ni on a polycrystalline Pt foil substrate. The adsorption of hydrogen and hydrogenation of cyclohexene are investigated using surface science experiments and density functional theory (DFT) calculations. The polycrystalline Pt–Ni–Pt subsurface structure shows general similarities to Pt–Ni–Pt(1 1 1) in the low-temperature hydrogenation pathway, demonstrating the validity of using single crystals to predict activity trends for more complex surfaces.

Experimental and theoretical studies are performed for the hydrogenation of cyclohexene on polycrystalline Ni/Pt bimetallic surfaces to bridge the materials gap between single crystal and more complex surfaces.Figure optionsDownload high-quality image (110 K)Download as PowerPoint slideHighlights
► Correlate theoretical calculations with catalytic activity.
► Hydrogen adsorption and cyclohexene hydrogenation explored.
► Polycrystalline surfaces exhibit unique activity compared with single crystal surfaces.
► Subsurface Ni-modified Pt surfaces are very active toward cyclohexene hydrogenation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 280, Issue 1, 16 May 2011, Pages 96–103
نویسندگان
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