کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5359726 | 1503681 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of porous Pt films deposited via sputtering
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper investigates the effect of platinum catalyst thickness and morphology on the electrochemical surface area using electron microscopy and cyclic voltammetry. The roughness and porosity of platinum catalyst are varied by using different argon pressures during platinum sputter-deposition process. Lower argon pressure results in denser and smoother platinum films, which are confirmed by scanning electron microscopy and atomic force microscopy, respectively. The cyclic voltammetry is then used to quantify the catalytic activity of the films with various thickness and morphology. The electrochemical surface area extracted from the cyclic voltammetry shows that the current density is enhanced by 4-5 orders of magnitude through the formation of finite amount of porosity using a higher argon pressure (>60Â mTorr) compared to a highly dense film.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 282, 1 October 2013, Pages 463-466
Journal: Applied Surface Science - Volume 282, 1 October 2013, Pages 463-466
نویسندگان
Ikwhang Chang, Seunghee Woo, Min Hwan Lee, Joon Hyung Shim, Yuanzhe Piao, Suk Won Cha,