石墨烯改性Ti/IrTaSnSb-G金属氧化物阳极在低温和低盐NaCl溶液中的电化学性能  

Electrochemical Properties of Graphene Modified Mixed Metal Oxide Anodes of Ti/IrTaSnSb-G in NaCl Solutions at Low Temperature

作　　者：王廷勇[1,2] 董如意 许实 王辉 WANG Tingyong;DONG Ruyi;XU Shi;WANG Hui(Luoyang Ship Material Research Institute,Luoyang 471000,China;Sunrui Marine Environment Engineering Co.,Ltd.,Qingdao 266101,China)

机构地区：[1]洛阳船舶材料研究所,洛阳471000 [2]青岛双瑞海洋环境工程股份有限公司,青岛266101

出　　处：《中国腐蚀与防护学报》2020年第3期289-294,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：采用热分解法制备了添加石墨烯的Ti/IrTaSnSb-G金属氧化物阳极,测试了阳极在1.5%NaCl溶液中的电化学性能,并通过SEM及EDS进行了显微形貌和成分分析,研究了石墨烯对阳极性能的影响。结果表明:石墨烯促进了IrO2在阳极表面偏析,其晶粒结构主要呈枝状,并存在二次结晶现象,形成纳米针状结构。此外,石墨烯阻碍了涂层中裂纹的扩展,使得阳极表面的裂纹更多、更细小,从而增大了阳极的活性表面积,进而提高了阳极的电化学活性。当石墨烯添加量为0.6 g/L时,氧化物阳极的性能改善最佳,在低温和低盐NaCl溶液中的电流效率分别提高了9%和13%。Graphene-modified mixed metal oxide anodes of Ti/IrTaSnSb-G were prepared by thermal decomposition,and then the electrochemical performance of the anodes in NaCl solutions was examined via electrochemical workshop type PAR2273 and SEM equipped with EDS in terms of the effect of graphene on the performance of anodes.The results show that the graphene promotes the segregation of IrO2,which then resulted in the formation of dendritic structure on the surface of the anodes,in the meanwhile,secondary crystallization phenomenon could induce the formation of nano-needle structure of IrO2,which increases the active surface areas and improves subsequently the electrocatalytic activity of the anodes.Besides,the electrolysis current efficiency of the electrode with 0.6 g/L graphene increases 9%in 3.5%NaCl solution at 5℃and 13%in 1.5%NaCl solution at 15℃respectively.

关 键 词：石墨烯 氧化物阳极 电化学活性 电流效率 

分 类 号：O646[理学—物理化学]