کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10276145 | 463419 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption of crown ethers on single and polycrystalline platinum-electrodes
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Adsorption of crown ethers on single and polycrystalline platinum-electrodes Adsorption of crown ethers on single and polycrystalline platinum-electrodes](/preview/png/10276145.png)
چکیده انگلیسی
For the functionalisation of electrode surfaces by organic molecules, platinum substrates offer the advantage of forming stable adsorption bonds to the molecules. The chemical stability and surface coverage of several adsorbed crown ethers, 18-crown-6 (18C6), benzo-18-crown-6 (B18C6) and 4â²-amino-dibenzo-18-crown-6 (4â²-ADB18C6) and for competitive purposes methoxy-benzene, have been studied at single- and polycrystalline platinum surfaces in 0.5Â M sulphuric acid with differential electrochemical mass spectrometry (DEMS). The crown ethers adsorb chemically intact in a limited potential region between 200 and 800Â mV vs. RHE. They undergo reductive cleaving of the ether ring moieties during cathodic potential shifts down to â100Â mV. By 13CO co-adsorption and subsequent oxidative desorption, the stability and reversibility of the adsorption of the crown ethers was investigated. STM images of 4â²-ADB18C6 reveal a disordered adsorbate layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 578, Issue 2, 1 May 2005, Pages 259-271
Journal: Journal of Electroanalytical Chemistry - Volume 578, Issue 2, 1 May 2005, Pages 259-271
نویسندگان
R. BuÃar, M. Nielinger, H. Baltruschat,