La_(0.9)Sr_(0.1)Al_(0.9)Mg_(0.1)O_(3-δ)-Ca_3(PO_4)_2-K_3PO_4复合电解质的合成及在常压天然气合成氨中的应用  

La_(0.9)Sr_(0.1)Al_(0.9)Mg_(0.1)O_(3-δ)-Ca_3(PO_4)_2-K_3PO_4 Composite Electrolyte:Preparation and Application to Ammonia Synthesis at Atmospheric Pressure

作　　者：刘玉星[1] 刘瑞泉[1] 王吉德[1] 

机构地区：[1]新疆大学化学与化工学院,乌鲁木齐830046

出　　处：《无机化学学报》2007年第2期339-342,共4页Chinese Journal of Inorganic Chemistry

基　　金：新疆维吾尔自治区高校科研重点项目(No.XJedu2004Ⅰ11)资助

摘　　要：0引言 在研究新的高性能低温陶瓷／氧化物燃料电池中．一类基于氧化物-无机盐的氧离子和质子导体的复合陶瓷材料引起人们极大的兴趣。Zhu等在这方面做了大量的研究工作。在这类复合陶瓷材料中．由于有无机盐的存在，一方面，大大提高了离子电导率．能满足高性能燃料电池的要求；另一方面，可以有效抑制电子导电．增强材料稳定性。有望成为中温固体氧化物燃料电池．氢传感器．电化学合成氨等领域最有市场前景的材料。La0.9Sr0.1Al0.9Mg0.1O0.9 （LSAM） was synthesized by the sol-gel method, an oxide-salt composite electrolyte LSAM-Ca3（PO4）2-K3PO4 was prepared by mixing the LSAM and phosphates. The mixture was ground and sintered at 1 400 ℃. Using the LSAM electrolyte and its oxide-salt composite as solid electrolytes and silver-palladium alloy as electrodes, electrical conductivity was measured at different conditions. Ammonia was synthesized from wet natural gas and nitrogen at atmospheric pressure in the solid state proton conducting cell reactor and the optimal conditions for ammonia production were determined. The oxide-salt composite exhibited much higher ionic conductivity and ammonia production rate than that of the LSAM electrolyte at 400-800 ℃, the rate of evolution of ammonia was up to 5.30 × 10^-9 mol.cm^-2.s^-1.

关 键 词：质子导体 天然气 复合陶瓷材料 合成氨 

分 类 号：O614.33[理学—无机化学]