热分解法制备SPE电解池一体化氧阳极  

Preparing integrated oxygen anode for SPE electrolyzer by thermal decomposition method

作　　者：蒋钜明[1,2] 刘高阳[1,2] 许军元[1,2] 王新东[1,2] 

机构地区：[1]北京科技大学高效钢铁冶金国家重点实验室,北京100083 [2]北京科技大学物理化学系,北京100083

出　　处：《电池》2014年第2期64-67,共4页Battery Bimonthly

基　　金：国家自然科学基金(51274028);北京市自然科学基金(2122041)

摘　　要：以氯铱酸为前驱体,钛网为支撑体,采用热分解法制备一体化IrO2/Ti氧阳极,热压法制备膜电极组件(MEA)。用SEM、循环伏安、交流阻抗、极化曲线及单体电解池测试,研究煅烧温度对氧阳极形貌及性能的影响。在300℃、350℃及400℃煅烧制备的氧阳极,表面以裂缝为主,且随着煅烧温度的升高,裂纹的宽度减小,孔隙率增加;在450℃、500℃煅烧制备的氧阳极,表面裂纹基本消失,同时生成致密的催化剂簇。400℃煅烧制备的氧阳极的析氧催化活性最好,在50℃、500 mA/cm2时,单体电解池可稳定运行203 h。Using chloroiridic acid as the precursor and titanium mesh as the support, integrated oxygen anode of IrO2/Ti was pre- pared by thermal decomposition method and membrane electrode assembly（MEA） was prepared via hot-press method. The effect of calcination temperature on the electrode morphology and performance was investigated by SEM, cyclic vohammogram, A. C. impe- dance, polarization curve and single electrolyzer tests. The electrode surface was mainly cracks, as the calcination temperatures were 300 ℃ ,350 ℃ and 400 ℃, reduced crack width and increased porosity was obtained with the increasing of calcination temperature. The cracks disappeared instead of dense catalyst clusters when the calcination temperatures were 450 ℃ and 500℃. The optimal calcination temperature was 400 ℃ and a test of such electrode in a single cell at 50 ℃ and 500 mA/cm2 showed good stability with a period of 203 h.

关 键 词：固体聚合物电解质水电解 一体化氧阳极 煅烧 热分解 氧化铱 

分 类 号：TQ150.1[化学工程—电化学工业]