کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1272880 1497604 2010 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stabilization of the palladium electrocatalyst with alloyed gold for ethanol oxidation
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Stabilization of the palladium electrocatalyst with alloyed gold for ethanol oxidation
چکیده انگلیسی

Motivated by the idea that a monometal catalyst can become more stabilized with the incorporation of gold due to its unique electron-withdrawing effect to neighboring primary metal atoms, in this work we prepare Pd–Au alloy electrocatalysts for the ethanol oxidation reaction in an alkaline medium with the dimethylformamide co-reduction method under an ultrasonic process. The atomic ratio of Pd to Au is varied from 7:1 to 3:1 and 1:1 on the basis of a crystal cell of the face-centered cubic. Electrochemical characterizations indicate that in terms of the peak current density, the prepared catalyst samples are in sequence of Pd/C > Pd3Au/C > Pd7Au/C > PdAu/C, but the stability tests demonstrate that the catalyst samples are sequenced in PdAu/C > Pd3Au/C > Pd7Au/C > Pd/C. On the compromise between the activity and stability, it turns out that the Pd3Au/C can exhibit an enhanced catalytic stability while maintain the comparable catalytic activity for the ethanol oxidation reaction as compared with the monometallic Pd/C catalyst.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 13, July 2010, Pages 6490–6500
نویسندگان
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