کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1277824 1497592 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size-controlled synthesis of Pt nanoparticles and their electrochemical activities toward oxygen reduction
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Size-controlled synthesis of Pt nanoparticles and their electrochemical activities toward oxygen reduction
چکیده انگلیسی

Pt/C catalysts with high activity toward oxygen reduction reactions are fabricated in the presence of FeCl3 as an additive to control the Pt particle size. The polyol method is used for fabrication; 20 wt% Pt/C catalysts are produced with various amounts of FeCl3 under different fabrication conditions such as pH and temperature. Adding FeCl3 significantly reduces Pt particle size, which is believed to occur as a result of the interference of Pt reduction rate by Fe3+ ions. The average Pt particle size obtained using the fabrication conditions of Pt:Fe = 1:3 (mole ratio), pH = 10, and 130 °C is around 2.0 nm, which is much smaller than that of commercial or homemade Pt/C produced in the absence of FeCl3. The electrochemically active surface area of this catalyst is 60.6 m2/g. The mass activities at 0.9 and 0.85 V are 15.3 and 42.7 mA/mgPt, respectively, which is about 1.8–2.1 times higher than those of commercial Pt/C catalysts. PEMFC test results show that the performance of the Pt/C catalyst fabricated with FeCl3 additive is better than that of as commercial catalyst.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 1, January 2011, Pages 706–712
نویسندگان
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