烧结时间对IrO_(2)-Ta_(2)O_(5)/Ti电极寿命及电化学性能的影响  

Effect of sintering time on service life and electrochemical performance of IrO_(2)-Ta_(2)O_(5)/Ti electrode

作　　者：陈影 温青 徐海清 曾繁波 胡洋 CHEN Ying;WEN Qing;XU Haiqing;ZENG Fanbo;HU Yang(College of Materials&Energy,South China Agricultural University,Guangzhou 510642,China;Guangzhou Honway Technology Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]华南农业大学材料与能源学院,广东广州510642 [2]广州鸿葳科技有限公司,广东广州510663

出　　处：《电镀与涂饰》2023年第10期29-34,共6页Electroplating & Finishing

摘　　要：将氯铱酸和五氯化钽正丁醇溶液按Ir与Ta的物质的量比7∶3混合,采用热分解法在不同烧结时间下制备了IrO_(2)-Ta_(2)O_(5)/Ti阳极。通过扫描电子显微镜(SEM)和X射线衍射仪(XRD)分别分析了电极表面涂层的形貌及物相组成,通过循环伏安曲线(CV)、线性扫描伏安曲线(LSV)、电化学阻抗谱(EIS)、标准强化寿命试验(SALT)等方法考察了电极的电化学性能和稳定性。结果表明:随着烧结时间的延长,阳极的电催化活性表面积总体呈减小的趋势,阳极涂层的物相组成及析氧电位未发生明显变化。单层烧结5 min所制备的阳极具有最高的电催化活性,但电解寿命最短;烧结15 min的阳极具有最长的电解寿命,电化学综合性能最佳。The IrO_(2)-Ta_(2)O_(5)/Ti anode was prepared by thermal decomposition with a n-butanol solution containing chloroiridic acid and tantalum pentachloride at a molar ratio of 7:3 after sintering for different time.The morphology and phase constitution of the coating on the electrode surface were examined by scanning electron microscopy(SEM)and X-ray diffraction(XRD),respectively.The electrochemical performance and stability of the electrode were studied by cyclic voltammetry(CV),linear sweep voltammetry(LSV),electrochemical impedance spectroscopy(EIS),and standard accelerated lifetime testing(SALT).The results showed that with the extending of sintering time,the electrocatalytically active surface area of the anode was generally decreased,while the phase constitution and oxygen evolution potential of the anode were changed slightly.The anode prepared by sintering each layer for 5 min had the highest electrocatalytic activity,but the shortest electrolysis lifetime.The anode prepared by sintering each layer for 15 min had the longest electrolysis lifetime and the best comprehensive electrochemical performance.

关 键 词：涂层钛阳极 二氧化铱 五氧化二钽 烧结时间 电化学性能 强化寿命 

分 类 号：TQ151[化学工程—电化学工业]