摘要
采用热分解法制备了加有一定量石墨烯(graphene)的Ir O2-Ta2O5涂层钛阳极(Ti/IrO2-Ta2O5-G),并运用场发射扫描电镜、能谱仪等分析手段和循环伏安、电化学阻抗谱、强化电解寿命等测试方法对阳极失效前后的微观形貌和电化学性能进行研究。结果表明:与传统的Ti/IrO2-Ta2O5阳极相比,Ti/IrO2-Ta2O5-G阳极在强化电解过程中槽压呈逐渐上升趋势,具有更长的强化电解寿命;涂层破损导致催化活性组分减少是Ti/IrO2-Ta2O5-G阳极失效的主要原因;失效后的Ti/IrO2-Ta2O5-G阳极仍具有一定的电催化活性。
The IrO2-Ta2O5 coated titanium anodes （Ti/IrO2-Ta2O5-G） with certain graphene contents were prepared by thermal decomposition method. The microstructure was analyzed by FESEM and EDS, and the electrochemical properties were investigated by electrochemical testing including accelerated life test （ALT）, cyclic voltammetry （CV）, and electrochemical impedance spectroscopy （EIS）. As compared with the traditional Ti/IrO2-Ta2O5 anode, the results indicate that the cell voltage of Ti/IrO2-Ta2O5-G anodes increases gradually with electrolysis time and has longer accelerated life. The components of electrocatalytic activity reduce with coating damaged, and it is the primary factor of Ti/IrO2-Ta2O5-G anodes leading to failure. The invalidated Ti/IrO2-Ta2O5-G anodes still have certain electrocatalytic activity.
出处
《热加工工艺》
CSCD
北大核心
2015年第18期147-151,共5页
Hot Working Technology
