钙钛矿型La_(1-x)Ca_xCoO_3纳米孔材料在Al-H_2O_2半燃料电池中的应用(英文)  

Application of Nanoporous Perovskite La_(1-x)Ca_xCoO_3 in an Al-H_2O_2 Semi Fuel Cell

作　　者：庄树新[1] 刘素琴[1] 张金宝[1] 涂飞跃[1] 黄红霞 黄可龙[1] 李艳华[1] 

机构地区：[1]中南大学化学化工学院,长沙410083 [2]桂林科技大学化学与生物工程学院,广西桂林541004

出　　处：《物理化学学报》2012年第2期355-360,共6页Acta Physico-Chimica Sinica

基　　金：supported by the National High-Tech Research and Development Program of China (863) (2008AA031205);Graduate Degree Thesis Innovation Foundation of Central South University, China (1343-74334000005)~~

摘　　要：通过改进的无定形柠檬酸前驱体法制备钙钛矿型La1-xCaxCoO3 (x=0.2,0.4,0.5)系列化合物. 使用循环伏安法和恒电流测试La1-xCaxCoO3系列化合物对于过氧化氢的电催化还原性能. 同时也检测了La1-xCaxCoO3化合物中La与Ca的摩尔比及煅烧温度对其催化性能的影响. 在La1-xCaxCoO3系列化合物中,650 °C煅烧的La0.6Ca0.4CoO3展现出最佳的催化活性. 在含有0.4 mo.ldm-3 H2O2的3.0 mo.ldm-3 KOH水溶液中,使用这种材料作为铝-H2O2半燃料电池的阴极催化剂,在150 mA.cm-2电流密度下该电池的电压为1.34 V,能量密度为201 mW.cm-2.Perovskite-type series of compounds La1-xCaxCoO3 （x=0.2, 0.4, 0.5） were synthesized by a modified amorphous citrate precursor method. Their catalytic activities for hydrogen peroxide electroreduction in 3.0 mol. dm-3 KOH at room temperature were evaluated by cyclic voltammetry and galvanostatic measurements. The influences of annealing temperature and the molar ratio of La to Ca of La1-xCaxCoO3 on catalytic performance were investigated. Among the series of compounds, La1-xCaxCoO3 calcined at 650 ℃ exhibited the highest catalytic activity. An aluminum-hydrogen peroxide semi fuel cell using La1-xCaxCoO3 as cathode catalyst achieved a peak power density of 201 mW. cm-2 at 150 mA-cm-2 and 1.34 V running in 0.4 mol.dm-3 H202.

关 键 词：铝半燃料电池 钙钛矿 过氧化氢电还原 碱性介质 

分 类 号：TM911.4[电气工程—电力电子与电力传动]