摘要
亚氧化钛具电化学窗口宽、耐蚀性好等诸多优点,是非常有应用潜力的污水处理用阳极材料。但目前关于其在污水处理方面的研究主要集中在其电化学性能,还未对其用于污水处理的强化电解性能进行过评价。本研究采用强化电解方法测试钛基亚氧化钛电极的寿命和失效前后的形貌和结构变化,分析其电化学性能和表面反应的机理。结果表明,亚氧化钛电极的强化电解寿命是320 h左右,每12 h反置电流可延长电解池整体寿命至840 h(电极寿命420 h),失效前后的亚氧化钛组成变化不大,涂层出现裂纹和脱落,导致基体钝化,使得槽压迅速升高而发生失效。
Ti_nO_（2 n-1）/Ti electrode is a potential anode for sewage electrochemical degradation due to its high conductivity and wide electrochemical window. However, few work was done to evaluate its accelerated life performance. The electrochemical properties and surface reaction mechanism of Ti_nO_（2 n-1）/Ti were analyzed by the accelerated life test method. The result shows that the accelerated life cycle of the Ti_nO_（2 n-1）/Ti electrode is about 320 h. The life cycle of it can be extended to 420 h by alternating the current direction. The failing reason of the Ti_nO_（2 n-1）/Ti electrode is the exfoliation of the coating, which causes the passivation of the Ti substrate; consequently the cell voltage is increased, and as a result, the electrode fails.
作者
黄国胜
刘峰
李相波
孙明先
Huang Guosheng;Liu Feng;Li Xiangbo;Sun Mingxian(State Key Laboratory for Marine Corrosion and Protection,Qingdao Branch of Luoyang Ship Materials Research Institute,Qingdao 266101,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2018年第7期2067-2071,共5页
Rare Metal Materials and Engineering
基金
海洋腐蚀与防护重点实验室基金(9140C2501060C25002)
关键词
亚氧化钛
电化学氧化
析氧电位
titanium sub-oxides
electrochemical oxidation
oxygen evolution potential
