کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5148165 | 1497380 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, characterization and performance determination of an Ag@Pt/C electrocatalyst for the ORR in a PEM fuel cell
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ag@Pt nanoparticles synthesized with different Ag/Pt mass ratios utilizing ultrasonic treatment method. These materials were supported on Vulcan XC-72 and utilized as cathode in a proton exchange membrane fuel cell (PEMFC). The morphology of this material characterized through the x-ray diffraction (XRD), induced coupled plasma atomic emission spectroscopy (ICP-OES) as well as; high resolution transmission electron microscopy (HRTEM) techniques. To begin with, it was proven that, the prepared Ag@Pt/C catalyst possessed a core-shell nanostructure. The electrochemical properties of this material investigated through the Cyclic Voltammetry (CV), linear sweep voltammetry (LSV) and Electrochemical Impedance Spectroscopy (EIS) in acidic media. Moreover; it was shown that, the Ag@Pt/C with Ag/Pt ratio of 1:3 possessed the largest electrochemical surface area (ESCA) of 67.8Â m2Â gâ1 and its oxygen reduction activity proceeded through a 4eâ reaction pathway. Furthermore; it was demonstrated that, the determined stability of the (1:3) Ag@Pt/C was significantly higher compared with those of other elctrocatalysts prepared at different Ag/Pt ratios in particular; to the one without the Ag element (i.e.; a commercial Pt/C one). Ultimately, the electrocatalytic behavior of the (1:3) Ag@Pt/C) investigated through a unit cell structure of a PEMFC and compared with that of a virgin commercial Pt/C cathode. It was observed that, the maximum power density of the MEA utilizing the (1:3) Ag@Pt/C electrocatalyst was 30% higher than that of the Pt/C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 45, 7 December 2016, Pages 20720-20730
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 45, 7 December 2016, Pages 20720-20730
نویسندگان
Ali Esfandiari, Mohammad Kazemeini, Dariush Bastani,