柠檬酸配比对合成钙钛矿型LaNiO_3催化剂结构的影响(英文)  

Study on the Effect of Proportion of Citric Acid to the Structure of Perovskite LaNiO_3

作　　者：王育华[1] 卢星河 佘鸿燕[2] 马楠[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]河北工程大学,河北邯郸056038

出　　处：《中山大学学报（自然科学版）》2007年第B06期306-307,共2页Acta Scientiarum Naturalium Universitatis Sunyatseni

摘　　要：以柠檬酸为配体采用溶胶-凝胶法合成了钙钛矿型双功能氧电极催化剂LaNiO3。热重-差热(TG-DTA)、X-射线衍射(XRD)分析、电镜扫描(SEM)等表征结果表明:不同柠檬酸配比对凝胶灰化、产物的结构和成分均有较大影响。当硝酸镧、硝酸镍、柠檬酸配比1∶1∶0.6～1∶1∶0.7时可制备出颗粒均匀的纳米棒状LaNiO3。Perovskite LaNiO3 which is used in bifunctional oxygen electrode is prepared by the sol-gel method using citric acid as complexing agent. Products are characterized using TG-DTA, XRD, SEM, et al. It showed that the proportion of citric acid have major influences on cineration of dried polymeric, the structure and component of LaNiO3. Uniformity nanoscaled LaNiO3 bar is got when the proportion of lanthanum nitiate, nickel nitrate and citric acid is between 1 ： 1 ： 0. 6 and 1 ： 1 ： 0.7. Furthermore, the effect of sufficient or insufficient proportion of citric acid to the formation and cineration of sol-gel, to the purity of phases and spatial structures of LaNiO3 are discussed.

关 键 词：LANIO3 溶胶-凝胶法 柠檬酸 钙钛矿型氧化物 

分 类 号：TM911[电气工程—电力电子与电力传动]