RuO2-IrO2-TiO2/NbOx-TiO2/Ti复合阳极的制备及性能
Preparation and performance of RuO2-IrO2-TiO2/NbOx-TiO2/Ti composite anode
宋贺庆 1杨海涛 2俞小花 3胡超权4
作者信息
- 1. 昆明理工大学冶金与能源工程学院,云南 昆明 650093;中国科学院过程工程研究所,北京 100190;中科南京绿色制造产业创新研究院,江苏南京 211135
- 2. 中国科学院过程工程研究所,北京 100190
- 3. 昆明理工大学冶金与能源工程学院,云南 昆明 650093
- 4. 中国科学院过程工程研究所,北京 100190;中科南京绿色制造产业创新研究院,江苏南京 211135
- 折叠
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RuO2-IrO2-TiO2/NbO,-TiO2/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.
Abstract
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 RuO2-IrO2-TiO2/NbOx-TiO2/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Key words
titanium coated electrodes/niobium-titanium interlayer/electrochemical property/enhanced electrolytic life引用本文复制引用
基金项目
国家自然科学基金(22078328)
国家自然科学基金(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)
出版年
2024
NETL
NSTL
万方数据