کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397240 | 1505780 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct decomposition of nitrogen monoxide over a K-deposited Co(0Â 0Â 0Â 1) surface: Comparison to K-doped cobalt oxide catalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Direct decomposition of nitrogen monoxide over a K-deposited Co(0Â 0Â 0Â 1) surface: Comparison to K-doped cobalt oxide catalysts Direct decomposition of nitrogen monoxide over a K-deposited Co(0Â 0Â 0Â 1) surface: Comparison to K-doped cobalt oxide catalysts](/preview/png/5397240.png)
چکیده انگلیسی
The influence of deposited potassium on the oxidation and NO reactivity of a Co(0 0 0 1) surface was studied using X-ray photoelectron spectroscopy. The formation of surface CoO was observed when the clean Co(0 0 0 1) surface was exposed to O2 at 500 K. In contrast, the Co atoms on the K-deposited Co(0 0 0 1) surface remained at a lower oxidation state, CoOx (0 < x < 1). No adsorption or dissociation of NO occurred on the CoO/Co(0 0 0 1) surface at 320 K, whereas a NO2â species formed on the oxidized K/Co(0 0 0 1) surface. This species is considered to be an intermediate in NO decomposition. It was concluded that the role of potassium was (i) to form the NO2â intermediate, and (ii) to keep the Co surface partially oxidized (CoOx) as the active site for the dissociation of the NO2â species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 150, Issues 2â3, February 2006, Pages 150-154
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 150, Issues 2â3, February 2006, Pages 150-154
نویسندگان
I. Nakamura, M. Haneda, H. Hamada, T. Fujitani,