کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5349619 | 1503644 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface structure and chemistry of Pt/Cu/Pt(1Â 1Â 1) near surface alloy model catalyst in CO
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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: Surface structure and chemistry of Pt/Cu/Pt(1Â 1Â 1) near surface alloy model catalyst in CO Surface structure and chemistry of Pt/Cu/Pt(1Â 1Â 1) near surface alloy model catalyst in CO](/preview/png/5349619.png)
چکیده انگلیسی
Near surface alloy (NSA) model catalyst Pt/Cu/Pt(1Â 1Â 1) was prepared on Pt(1Â 1Â 1) through a controlled vapor deposition of Cu atoms. Different coordination environments of Pt atoms of the topmost Pt layer with the underneath Cu atoms in the subsurface result in different local electronic structures of surface Pt atoms. Surface structure and chemistry of the NAS model catalyst in Torr pressure of CO were studied with high pressure scanning tunneling microscopy (HP-STM) and ambient pressure X-ray photoelectron spectroscopy (AP-XPS). In Torr pressure of CO, the topmost Pt layer of Pt/Cu/Pt(1Â 1Â 1) is restructured to thin nanoclusters with size of about 1Â nm. Photoemission feature of O 1s of CO on Pt/Cu/Pt(1Â 1Â 1) suggests CO adsorbed on both edge and surface of these formed nanoclusters. This surface is active for CO oxidation. Atomic layers of carbon are formed on Pt/Cu/Pt(1Â 1Â 1) at 573Â K in 2Â Torr of CO.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 320, 30 November 2014, Pages 225-230
Journal: Applied Surface Science - Volume 320, 30 November 2014, Pages 225-230
نویسندگان
Shibi Zeng, Luan Nguyen, Fang Cheng, Lacheng Liu, Ying Yu, Franklin (Feng) Tao,