کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5448443 | 1511776 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetic study and growth behavior of template-based electrodeposited platinum nanotubes controlled by overpotential
ترجمه فارسی عنوان
مطالعه سینتیکی و رفتار رشد نانولوله های پلاتین الکترودهایی که بر پایه ی نمونه بر روی آنها قرار دارد کنترل می شود
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کلمات کلیدی
نانوساختارها، تکنیک های الکتروشیمیایی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
Platinum nanotubes (PtNTs) are fabricated by potentiostatic electrodeposition at various overpotentials (â200 up to â400 mV versus SCE) in polycarbonate templates (PCTs) with pore diameter of 200 nm in a solution containing 5 mM H2PtCl6 and 0.1 M H2SO4. The synthesized PtNTs are characterized by field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The electrochemical growth mechanism within nanoscopic pores and the relationship between morphological variations and kinetic parameters are investigated for the first time. It is shown that more porous structure of nanotubes forms at high overpotentials possibly due to preferably nucleation. The kinetics of electrodeposition process is studied by electrochemical techniques such as voltammetry and chronoamperometry. The linear diffusion coefficient at the early stage of the deposition and the radial diffusion coefficients at steady state regime are calculated as D = 8.39 Ã 10â5 and 2.33-13.26 Ã 10â8 cm2/s, respectively. The synthesized PtNT electrode is tested as electrocatalyst for hydrogen peroxide oxidation in phosphate buffer solution (PBS) and shows a sensitivity as high as 2.89 mA per 1 μM that is an indication to its enlarged electrochemical surface area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 187, 1 February 2017, Pages 141-148
Journal: Materials Chemistry and Physics - Volume 187, 1 February 2017, Pages 141-148
نویسندگان
E. Yousefi, A. Dolati, I. Imanieh, H. Yashiro, S.-Z. Kure-Chu,