کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1525528 995357 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of calcination temperature of IrO2/Ti electrodes on oxygen reduction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Influence of calcination temperature of IrO2/Ti electrodes on oxygen reduction
چکیده انگلیسی

IrO2-coated titanium plate electrocatalysts prepared by a dip-coating method (IrO2/Ti) with different calcination temperatures are characterized by scanning electron microscope, X-ray diffraction and X-ray photoelectron spectroscopy. The electrocatalytic behavior of the oxygen reduction reaction (ORR) is evaluated by cyclic voltammetry and galvanostatic electrolysis in 1 mol dm−3 KOH solution. The effects of calcination temperature on the oxygen reduction pathway are examined. Galvanostatic electrolysis results show that the reaction pathway on the IrO2/Ti electrode prepared at high calcination temperature is mainly a two-electron pathway producing H2O2. It is observed that higher calcination temperatures produce: a more uniform fault-free surface; reduced levels of Cl contamination (residual Cl presumably from incomplete IrCl3 decomposition during the coating process); higher levels of rutile character of the IrO2 layer; lower hydration levels. It is confirmed that ORR electrocatalytic behavior on highly hydrated IrO2 is better than on slightly hydrated IrO2.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 115, Issue 1, 15 May 2009, Pages 93–97
نویسندگان
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