کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185743 459603 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Based on a new support for synthesis of highly efficient palladium/hydroxyapatite catalyst for ethanol electrooxidation
ترجمه فارسی عنوان
بر اساس یک حمایت جدید برای سنتز کاتالیزور پالادیوم / هیدروکسی آپاتیت بسیار کارآمد برای الکترو اکسیداسیون اتانول
کلمات کلیدی
کاتالیزور پالادیوم / هیدروکسی آپاتیت، اتانول الکترو اکسیداسیون، سلول سوخت مستقیم اتانول
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

Based on a new support, hydroxyapatite (HAP), a facile and low–cost preparation of palladium/hydroxyapatite catalyst for ethanol electrooxidation is introduced in this paper through a solvothermal reaction without additives. HAP was employed as the catalyst support for its hydroxyl–rich surface in order to increase the stability and utilization ratio of catalyst. According to transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM) and X–ray diffraction (XRD) measurements, the as–prepared Pd nanoparticles with face–centered cubic crystal structure were evenly deposited on the surface of HAP. Cyclic voltammetry and chronoamperometry tests demonstrated that the Pd/HAP catalyst possessed a much higher current density (246 mA cm−2) than the Pd/C catalyst (109 mA cm−2) towards ethanol electrooxidation, and better stability as well. In the direct ethanol fuel cell (DEFC) test, Pd/HAP catalyst gives better performance than that with Pd/C in terms of both open-circuit voltage (OCV) and power density. These results indicate that the HAP is a better support and the catalyst developed in this study may be a better candidate for DEFCs. A possible mechanism consistent with the experimental is also proposed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 132, 20 June 2014, Pages 31–36
نویسندگان
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