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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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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 (BaZr0.8Y0.2O3âδ) in a temperature range of 475-600 °C at atmospheric pressure. Silver (Ag), platinum (Pt), and lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.2Fe0.8O3âδ) are used for both anode and cathode electrocatalysts. Maximum ammonia formation rates of 4.9 Ã 10â11 mol cmâ2 sâ1 and 8.5 Ã 10â11 mol cmâ2 sâ1 are observed for Ag and La0.6Sr0.4Co0.2Fe0.8O3âδ electrocatalysts, respectively, when a voltage of 0.8 V is applied. However, Pt electrocatalyst shows a negligible ammonia formation rate lower than 1 Ã 10â12 mol cmâ2 sâ1. 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
Journal: Journal of Power Sources - Volume 284, 15 June 2015, Pages 245-251
نویسندگان
Dae Sik Yun, Jong Hoon Joo, Ji Haeng Yu, Hyung Chul Yoon, Jong-Nam Kim, Chung-Yul Yoo,