کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8044197 1518915 2018 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
XPS study of cobalt-ceria catalysts for ammonia synthesis - The reduction process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
XPS study of cobalt-ceria catalysts for ammonia synthesis - The reduction process
چکیده انگلیسی
The activation process of a cobalt catalyst promoted with cerium compounds was examined. The reduction of precursor was performed in a High Pressure Cell (HPC), being a part of an ultra-high vacuum (UHV) system, at 500 °C under hydrogen atmosphere. X-ray photoelectron spectroscopy (XPS) was subsequently used to investigate the evolution of surface composition. High resolution X-ray photoelectron analysis confirms total reduction of cobalt oxide into Co metallic form. After exposure to hydrogen, Ce4+ ions prevail in the structure of cerium oxides identified on the surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 155, September 2018, Pages 434-438
نویسندگان
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