کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7832276 | 1503292 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct Electrochemistry and Bioelectrocatalysis of Myoglobin at a Carbon Nanotube-Modified Electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Myoglobin (Mb) was immobilized onto the surface of carbon nanotube (CNT) and was characterized by AFM, XPS, UV-Vis, and FTIR spectroscopy. The promotion effect of CNT on direct electron transfer (DET) reaction of Mb was studied. Cyclic voltammetric results showed a pair of well-defined redox peaks, which corresponded to DET of Mb, with the formal potential (E0) of (-0.343 ± 0.001) V (vs SCE) in the phosphate buffer solution (PBS, pH 7.0). The electrochemical parameters, such as apparent heterogeneous electron transfer rate constant (ks) and E0, were determined. The dependence of E0' on solution pH indicated that DET reaction of Mb was coupled with proton transfer. The experimental results also demonstrated that the immobilized Mb retained its bioelectrocatalytic activity toward the reduction of H2O2 and O2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Physico-Chimica Sinica - Volume 23, Issue 1, January 2007, Pages 5-12
Journal: Acta Physico-Chimica Sinica - Volume 23, Issue 1, January 2007, Pages 5-12
نویسندگان
Yafen Lü, Yajing Yin, Ping Wu, Chenxin Cai,