کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10266982 | 459428 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct electrochemistry of cytochrome c on a multi-walled carbon nanotubes modified electrode and its electrocatalytic activity for the reduction of H2O2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Direct electrochemistry of cytochrome c (Cyt c), which was adsorbed on the surface of multi-walled carbon nanotubes (MWNTs), was investigated. The results from electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) suggested that Cyt c could be tightly adsorbed on the surface of MWNTs and MWNTs show an obvious promotion for the direct electro-transfer between Cyt c and electrode. A couple of well-defined and quasi-reversible CV peaks of Cyt c can be observed in a phosphate buffer solution (pH 7.0). Cyt c adsorbed on MWNTs exhibits a remarkable electrocatalytic activity for the reduction of hydrogen peroxide (H2O2). The calculated apparent Michaelis-Menten constant (Kmapp) was 857 μM, indicating a high catalytic activity of Cyt c adsorbed on MWNTs modified electrode to the reduction of H2O2. Based on these, a third generation reagentless biosensor can be constructed for the determination of H2O2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 7, Issue 3, March 2005, Pages 256-260
Journal: Electrochemistry Communications - Volume 7, Issue 3, March 2005, Pages 256-260
نویسندگان
Guang-Chao Zhao, Zheng-Zhi Yin, Li Zhang, Xian-Wen Wei,