阳极支撑BZCY电解质及GBFN阴极膜在常压合成氨中的性能研究  

Performances of Anode-Supported BZCY Electrolyte and GBFN Cathode Membranes in Ammonia Synthesis at Atmospheric Pressure

作　　者：朱剑莉[1] 马桂林[2] 占忠亮[3] 

机构地区：[1]淮安信息职业技术学院基础部,江苏淮安223003 [2]苏州大学材料与化学化工学部,江苏省有机合成重点实验室,江苏苏州215123 [3]中国科学院上海硅酸盐研究所,上海200050

出　　处：《中国稀土学报》2012年第6期744-749,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(51072219,20771079)资助

摘　　要：采用硝酸盐-柠檬酸法制备了BaZr0.1Ce0.7Y0.2O3-α(BZCY)质子电解质及GdBaFeNiO5+δ(GBFN)阴极材料,用浆料旋涂法结合后续的热处理在NiO-BZCY阳极支撑体上制备致密的BZCY电解质薄膜,在电解质薄膜上制备多孔性GBFN阴极膜,成功地组装成合成氨膜反应器。以氢、氮气为反应气体,通过电解方法进行了常压合成氨试验。结果显示,BZCY及GBFN分别具有钙钛矿型及双钙钛矿型结构,NiO与BZ-CY具有良好的化学兼容性,合成氨产率高达1.63×10-8mol.s-.1cm-2,高于迄今所报道的类似方法的合成氨产率。这与BZCY电解质膜优良的导电性能、GBFN膜优良的极化性能密切相关。Ag对GBFN的修饰也有利于氨产率的提高。BaZr0.1 Ceo.7 Yo.2 03 -a （BZCY） proton-con- ducting electrolyte and GdBaFeNiO5＋δ （ GBFN ） cath- ode materials were prepared by the citric-nitrate process. A membrane reactor for ammonia synthesis was successfully fabricated through the following process： an anode-supported dense BZCY electrolyte membrane was first fabricated, and then on the mem- brane porous GBFN cathode membrane was fabricated by a simple spin coating process combined with heat treat- ment. The ammonia synthesis test was conducted by an electrolytic method using H2 and N2 as reactant gases. The results indicated that BZCY and GBFN were perovs-kite and double perovskite structures, respectively. The anode substrate showed good chemical compatibility be- tween NiO and BZCY, and the maximum ammonia for- mation rate reached 1.63 × 10^-8 mol .s^-1.cm-2 which was higher than the reported values by similar methods to date. The high maximum ammonia formation rate mould be closely relevant to excellent electrical con- duction performance for BZCY and excellent polariza- tion performance for GBFN. The modification of Ag on the GBFN cathode was also beneficial for enhancing the ammonia formation rate.

关 键 词：常压合成氨 GdBaFeNiO5+δ 陶瓷膜 阴极材料 质子导体 稀土 

分 类 号：O614.33[理学—无机化学]