RuO_(2)-IrO_(2)-TiO_(2)/NbO_(x)-TiO_(2)/Ti复合阳极的制备及性能  

Preparation and performance of RuO_(2)-IrO_(2)-TiO_(2)/NbO_(x)-TiO_(2)/Ti composite anode

作　　者：宋贺庆 杨海涛[2] 俞小花[1] 胡超权 SONG He-qing;YANG Hai-tao;YU Xiao-hua;HU Chao-quan(Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Nanjing IPE Institute of Green Manufacturing Industry,Nanjing 211135,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]中国科学院过程工程研究所,北京100190 [3]中科南京绿色制造产业创新研究院,江苏南京211135

出　　处：《材料热处理学报》2024年第10期1-9,共9页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(22078328,51504231);多相复杂系统国家重点实验室(MPCS-2022-A-02);中国科学院绿色过程制造创新研究院(IAGM2022D08);云南省万人计划项目(YNWR-QNBJ-2018-327)。

摘　　要：以Ti/Nb的质量比为100、75、50、25和10配制了中间层溶液,以原子比Ir∶Ru∶Ti=1∶3∶3配制了活性层溶液,采用热分解法制备了钛基铌-钛中间层的涂层电极。对其在酸性析氧条件下的改性性能进行研究,并分析其失效机理。利用X射线衍射(XRD)、扫描电镜(SEM)和能谱仪(EDS)分析其失效前后的物相和形貌变化,通过强化电解寿命实验、电化学分析等研究了RuO_(2)-IrO_(2)-TiO_(2)/NbO_(x)-TiO_(2)/Ti电极在酸性体系中的性能。结果表明:在酸性体系下,电极失效主要是由活性层的溶解脱落以及电极表面生成不导电的钛氧化物造成的;中间层铌-钛比为1∶10的涂层电极寿命更佳,较未掺杂中间层的涂层阳极寿命提升明显,但电压增加;综合考虑能耗与服役时间,中间层铌-钛比为1∶25的电极更符合实际生产的需求。Intermediate layer solutions were prepared with Ti/Nb mass ratios of 100,75,50,25 and 10,and active layer solutions were prepared with an atomic ratio of Ir∶Ru∶Ti=1∶3∶3.Titanium based niobium-titanium intermediate layer coated electrodes were prepared using thermal decomposition method.The modification performance of the electrodes under acidic oxygen evolution conditions was studied,and their failure mechanism was analyzed.The phase and morphology changes of the electrodes before and after failure were analyzed using X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS)analysis.The performance of RuO_(2)-IrO_(2)-TiO_(2)/NbO_(x)-TiO_(2)/Ti electrodes in acidic systems was studied by enhanced electrochemical lifetime experiments and electrochemical analysis.The results show that in acidic systems,electrode failure is mainly caused by the dissolution and detachment of the active layer,as well as the formation of non-conductive titanium oxide on the electrode surface.The coating electrode with a niobium-titanium ratio of 1∶10 in the intermediate layer has a better lifespan,and its lifespan is significantly improved compared to the anode without doping the intermediate layer,but the voltage increases.Taking into account energy consumption and service time,an electrode with a niobium-titanium ratio of 1∶25 in the intermediate layer is more suitable for practical production needs.

关 键 词：钛涂层电极 铌-钛中间层 电化学性能 强化电解寿命 

分 类 号：TB333[一般工业技术—材料科学与工程]