烧结温度对含石墨烯Ti/IrTaSnSb金属氧化物阳极性能的影响  

Effect of Sintering Temperature on Properties of Graphenecontaining Ti/IrTaSnSb-G Metal Oxide Anodes

作　　者：韦鉴峰 付洪田[1,2] 王廷勇 许实[2] 王辉 王海涛 WEI Jianfeng;FU Hongtian;WANG Tingyong;XU Shi;WANG Hui;WANG Haitao(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》2018年第3期248-254,共7页Journal of Chinese Society For Corrosion and Protection

摘　　要：采用热分解法制备了不同烧结温度的含石墨烯的Ti/Ir(MOE)Ta(MOE)Sn(MOE)Sb金属氧化物阳极,测试了阳极在1.5%(质量分数)Na(MOE)Cl溶液中的电化学性能,并通过SEM及EDS进行了显微形貌分析,研究了烧结温度对阳极性能的影响。结果表明:在适宜的烧结温度下,石墨烯促进Ir(MOE)O_2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,从而增大了阳极的活性表面积,提高了阳极的电催化活性;但烧结温度过高会导致石墨烯快速氧化分解,以及Ir(MOE)O_2在阳极表面偏析减少。另外,随着烧结温度的升高,阳极的电催化活性升高;当烧结温度为460℃时,阳极的析氯活性最好,随后电催化活性逐渐降低。Ti/IrTaSnSb-G anodes were prepared by thermal decomposition at different sintering temperatures, and then characterized by means of SEM with EDS. The electrochemical performance of the anodes in 1.5%（mass fraction） Na Cl solution was assessed and the effect of sintering temperature on the property of the anodes was further studied. Results show that graphene promotes the segregation of IrO2 with dendritic structure on the surface of anodes at the appropriate sintering temperature, and the secondary crystallization phenomenon was found to produce the nano-needle structure of IrO2, which increases the active surface areas and improves the electrocatalytic activity of the anodes. However, the much higher sintering temperature will lead to rapid oxidative decomposition of graphene, which results in the decrease of IrO2 on the anode surface. The study also finds that the electrocatalytic activity of the anodes increases firstly as sintering temperature rises and then the gradually becomes poor. Among others, the anode prepared by sintering at 460 ℃ presents the best performance.

关 键 词：石墨烯 氧化物阳极 烧结温度 电催化活性 

分 类 号：TG146.34[一般工业技术—材料科学与工程] TB321[金属学及工艺—金属材料]