توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱The effect of cetyl–trimethylammonium bromide (CTAB) concentration on synthesis of Pt particle size in the reverse micelle
اطلاعات انتشار: سومین همایش پیل سوختی ایران، سال
تعداد صفحات: ۱۷
Synthesis of carbon–supported Pt\C catalysts using a new preparation technique, a water–in–oil microemulsion or reverse micelle method, is reported. The influence of the cetyl–trimethylammonium bromide (CTAB) concentration, as a surfactant, over the reverse micelles size and then over the Pt nanoparticle size was studied. The catalysts were characterized by electrochemical and surface techniques such as: Cyclic voltammetry, chronoamperometry, linear sweep voltammetry impedance spectroscopy, X–ray diffraction and scanning electron microscope. Surface and electrochemical characterizations showed that Pt nanoparticles on catalysts were synthesized since the reverse micelle method was used. The performance of the Pt\C catalysts was tested by the rotating disk electrode and 3–electrode techniques. A trend of catalytic activity for oxygen reduction reaction (ORR) was obtained: Pt\C(CTAB 0.11M) > Pt\C(CTAB 0.22M)> Pt\C(CTAB 0.055M) > Pt\C(CTAB 0.5M) > Pt\C(CTAB 0.022M), showing that Pt\C(CTAB 0.11M) catalyst had a best catalytic activity for ORR.<\div>
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