کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760483 | 1498049 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemistry of poly(vinylferrocene) modified electrodes in aqueous acidic media
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A cyclic voltammetric study of the electrochemistry and chemical stability of the poly(vinylferrocene) (PVFc) redox couple, coated on a gold substrate, in aqueous solutions of H2SO4, HClO4 and HCl was carried out. It was found that the anodic peak potential (Epa) did not depend on the acid concentration in the range (1.0 Ã 10â2 to 1.0 Ã 10â7 mol Lâ1). However, the Epa values shifted linearly to less positive potentials when investigated in more concentrated acid solutions in the range 1-5 mol Lâ1. The slope of the Epa versus acid concentration graph was found to be in the order H2SO4 > HCl > HClO4. In this regard PVFc behaved very similar to 1,1â²-bis(11-mercaptoundecyl)ferrocene (Fc(C11SH)2) except for its chemical stability. In H2SO4 media the PVFc was found to be much less stable than 1,1â²-Fc(C11SH)2. The dependence of Epa on acid concentration could be used to monitor state of charge of lead-acid batteries. However, for this application Fc(C11SH)2 would be a better choice because of its superior chemical stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 140, Issue 2, 2 February 2005, Pages 388-391
Journal: Journal of Power Sources - Volume 140, Issue 2, 2 February 2005, Pages 388-391
نویسندگان
Touma B. Issa, Pritam Singh, Murray V. Baker,