کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7732695 1497948 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical ammonia synthesis from steam and nitrogen using proton conducting yttrium doped barium zirconate electrolyte with silver, platinum, and lanthanum strontium cobalt ferrite electrocatalyst
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Electrochemical ammonia synthesis from steam and nitrogen using proton conducting yttrium doped barium zirconate electrolyte with silver, platinum, and lanthanum strontium cobalt ferrite electrocatalyst
چکیده انگلیسی
Electrochemical ammonia synthesis from steam and nitrogen has been systematically investigated using a proton-conducting electrolyte supported cell based on 20 mol% yttrium doped barium zirconate (BaZr0.8Y0.2O3−δ) in a temperature range of 475-600 °C at atmospheric pressure. Silver (Ag), platinum (Pt), and lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.2Fe0.8O3−δ) are used for both anode and cathode electrocatalysts. Maximum ammonia formation rates of 4.9 × 10−11 mol cm−2 s−1 and 8.5 × 10−11 mol cm−2 s−1 are observed for Ag and La0.6Sr0.4Co0.2Fe0.8O3−δ electrocatalysts, respectively, when a voltage of 0.8 V is applied. However, Pt electrocatalyst shows a negligible ammonia formation rate lower than 1 × 10−12 mol cm−2 s−1. This is ascribed to the high activity of Pt for the hydrogen evolution reaction rather than the ammonia formation reaction. The conversion efficiency of all electrocatalysts is below 1%, primarily due to the limited nitrogen disassociation activity of the electrocatalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 284, 15 June 2015, Pages 245-251
نویسندگان
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