کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7736173 1497964 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of reduced tantalum pentoxide by electrochemical technique for oxygen reduction reaction
ترجمه فارسی عنوان
تهیه پنتوکساید تانتالم کاهش یافته توسط روش الکتروشیمیایی برای واکنش اکسیژن کاهش
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
A non-Pt based electrocatalyst, tantalum oxide (TaOx) deposited on glassy carbon, for oxygen reduction reaction (ORR) in acidic solutions was prepared by electrochemical technique. The tantalum pentoxide (Ta2O5) formed on the as-prepared deposits was electrochemically reduced to generate its reduced species which conventionally need a heat treatment under H2 atmosphere. The reduced Ta2O5 shows a fairly high onset potential of ORR (0.87 V vs. RHE) in comparison with that (0.98 V) at a commercially available Pt/C catalyst. The ORR performance of the TaOx was investigated using a rotating ring-disk electrode voltammetry showing that a four-electron ORR takes place actually at potential above ca. 0.8 V and a two-electron ORR becomes significant gradually as the potential is increased negatively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 268, 5 December 2014, Pages 728-732
نویسندگان
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