Highly conductive proton-conducting electrolyte with a low sintering temperature for electrochemical ammonia synthesis

被引：12
|
作者：
Lei, Ze [1 ]
Jing, Junmeng [1 ]
Pang, Jie [1 ,3 ]
Hu, Ranyue [1 ]
Shi, Xingting [1 ]
Yang, Zhibin [1 ]
Peng, Suping [2 ]
机构：
[1] China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
[2] China Univ Min & Technol Beijing, State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China
[3] Henan Univ, Coll Chem & Chem Engn, Henan Engn Lab Flame Retardant & Funct Mat, Kaifeng 475004, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 15期
基金：
国家重点研发计划;
关键词：
Proton conductor; BaCe0.7Zr0.1Gd0.2O3-delta; Li2CO3; Sintering; Electrochemical ammonia synthesis; DOPED BARIUM ZIRCONATE; OXIDE FUEL-CELLS; ELECTRICAL-PROPERTIES; ELECTROCATALYTIC SYNTHESIS; CHEMICAL-STABILITY; GD; NITROGEN; BEHAVIOR; SM; LN;
D O I：
10.1016/j.ijhydene.2020.01.039
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
BaCe0.7Zr0.1Gd0.2O3-delta (BCZG) powder is synthesized by a citrate sol-gel method, and different amounts of Li2CO3 are introduced to lower the sintering temperature. The densification temperature of BCZG ceramic is decreased drastically to 1250 degrees C by using Li2CO3 as sintering aid. BCZG with 2.5 wt% of Li2CO3 (BCZG-2.5L) can not only remarkably promote the sintering process of BCZG but also enhance its electrical conductivity. The total ionic conductivity of BCZG-2.5L attains to 1.9 x 10(-2) S cm(-1) at 600 degrees C in a wet H-2 atmosphere. Ammonia synthesis at atmospheric pressure is conducted on (2K, 10Fe)/Ni-BCZG vertical bar BCZG-2.5L vertical bar Ni-BCZG electrolytic cell with an applied voltage of 0.2-1.6 V at a temperature of 450-600 degrees C. The highest NH3 formation rate of 1.87 x 10(-10) mol s(-1) cm(-2) and the highest current efficiency of 0.53% is achieved at 500 degrees C with an applied voltage of 0.8 V. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：8041 / 8051
页数：11
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