کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10267154 | 459445 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strictly potentiostatic current oscillations during bulk CO electro-oxidation on platinum in the presence of inhibiting anions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We investigate bulk CO electrooxidation on a rotating Pt disk electrode in concentrated acidic electrolytes containing small amounts of BF4- anions with cyclic voltammetry and potentiostatic measurements. Under potentiodynamic conditions, the average reactivity decreases with increasing BF4--concentration. For fixed applied potential strictly potentiostatic current oscillations were observed. Both observations are reproduced with a mean field model for CO electrooxidation in which the anions are assumed to competitively adsorb on free electrode sites while the electrode potential is treated as a parameter. Bulk CO electrooxidation on Pt in the presence of inhibiting anions is thus an example of an electrochemical oscillator with purely chemical feedback loops.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 7, Issue 7, July 2005, Pages 710-716
Journal: Electrochemistry Communications - Volume 7, Issue 7, July 2005, Pages 710-716
نویسندگان
Souradip Malkhandi, Antoine Bonnefont, Katharina Krischer,