کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5424110 | 1395814 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbon monoxide adsorption on the metastable fcc-Co/Cu(1Â 0Â 0) surface
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Carbon monoxide adsorption on the metastable fcc-Co/Cu(1Â 0Â 0) surface Carbon monoxide adsorption on the metastable fcc-Co/Cu(1Â 0Â 0) surface](/preview/png/5424110.png)
چکیده انگلیسی
The adsorption properties of CO on the epitaxial five-monolayer Co/Cu(1Â 0Â 0) system, where the Co overlayer has stabilized in the metastable fcc-phase, are reported. This system is known to exhibit metallic quantum well (MQW) states at energies 1Â eV or greater above the Fermi level, which may influence CO adsorption. The CO/fcc-Co/Cu(1Â 0Â 0) system was explored with low energy electron diffraction (LEED), inverse photoemission (IPE), reflection-absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TPD). Upon CO adsorption, a new feature is observed in IPE at 4.4Â eV above EF and is interpreted as the CO 2Ïâ level. When adsorbed at room temperature, TPD exhibits a CO desorption peak at â¼355Â K, while low temperature adsorption reveals additional binding configurations with TPD features at â¼220Â K and â¼265Â K. These TPD peak temperatures are correlated with different C-O stretch vibrational frequencies observed in the IR spectra. The adsorption properties of this surface are compared to those of the surfaces of single crystal hcp-Co, as well as other metastable thin film systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 5, 1 March 2009, Pages 802-806
Journal: Surface Science - Volume 603, Issue 5, 1 March 2009, Pages 802-806
نویسندگان
L. Tskipuri, R.A. Bartynski,