کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
191573 459724 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of Pd–Sn nanoparticles by ultrasonic irradiation and their electrocatalytic activity for oxygen reduction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis of Pd–Sn nanoparticles by ultrasonic irradiation and their electrocatalytic activity for oxygen reduction
چکیده انگلیسی

Nanoparticles of Pd–Sn were prepared under various conditions by applying ultrasonic irradiation, and their electrocatalytic activity for oxygen reduction was evaluated in 0.5 M KOH. The average size of Pd–Sn nanoparticles thus prepared was about 3–5 nm. The Pd in Pd–Sn nanoparticles was found to be mostly in the metallic state. The electrocatalytic activity of the Pd–Sn nanoparticles for the oxygen reduction reaction (ORR) is greater than Pt or Pd nanoparticles in alkaline media. The molar ratio of Pd to Sn metal ions in the synthesizing solution, their initial concentrations, the concentration of ethanol, which increases primary hydrogen radicals during sonolysis, and the concentration of citric acid were found to affect the size distribution of the Pd–Sn nanoparticles, and therefore, those factors controlled the electrocatalytic activity for ORR. Particularly, the concentration of citric acid was found to be important for controlling the surface property on Pd–Sn particles to adjust the electrocatalytic activity for ORR.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 54, Issue 12, 30 April 2009, Pages 3412–3418
نویسندگان
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