کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
53365 1419190 2016 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله
Control of the surface atomic population of Rh0.5Pd0.5 bimetallic nanoparticles supported on CeO2
ترجمه فارسی عنوان
کنترل سطح جمعیت اتمی نانوذرات دو فلزی Rh0.5Pd0.5 در پشتیبانی CeO2
کلمات کلیدی
تعامل قوی با فلز؛ نانوذرات دو فلزی؛ AP-XPS؛ RhPd؛ CeO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• APXPS reveals surface segregation behavior of RhPd on CeO2 in situ.
• SMSI effect during a high temperature treatment (480 °C) in H2 atmosphere is observed.
• SMSI changes the switching between Pd and Rh atoms under different atmospheres.

Rh0.5Pd0.5/CeO2 bimetallic nanoparticles were subjected to reducing and oxidizing atmospheres at different temperatures and characterized by means of the Ambient Pressure X-Ray Photoelectron Spectroscopy (AP-XPS). The surface atomic population is calculated for all cases. By using a high temperature pre-treatment at 480 °C in H2 atmosphere, it was possible to control the surface atomic population with Pd atoms frozen at the skin layer even in an oxidizing atmosphere, which is not observed without high temperature pre-treatment (Rh atoms at the skin layer). The change of the Rh/Pd surface segregation behavior after the high temperature pre-treatment is attributed to the geometrical factor of Strong Metal Support Interaction (SMSI) effect, i.e., the occurrence of the ceria capping layer around nanoparticles.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 260, 1 February 2016, Pages 95–99
نویسندگان
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