Abstract: Ti-based manganese dioxide coated electrode(Ti/MnO₂) is known as a promising anode material.Ti/MnO₂ catalytic electrode was prepared through the method of electro-deposition and the electrode coating was represented with SEM.The performance of Ti/MnO₂ electrode was tested by such electrochemical methods as cyclic voltammetry,anodic polarization and Tafel diagram.Methanol was subject to electro-catalytic oxidation with prepared Ti/MnO₂ electrode where study was carried out regarding the influence of current intensity,methanol concentration and electrolysis time on methanol electrolytic rate.Results indicated that with evenly-distributed grain and less cracks,Ti/MnO₂ catalytic electrode can cover Ti substrate well.In case the current intensity was controlled at 1.0mA,the electrolyte concentration at 0.4mg/mL and the electrolytic time at 50min,the maximum catalytic oxidation activity of electrode on methanol could be reached and the electrolytic rate was up to 85.16%.

Key words: Ti/MnO₂electrode, electro-deposition, catalytic oxidation, cyclic voltamm

摘要： 钛基二氧化锰涂层电极（Ti/MnO₂）被认为是一种有发展前途的阳极材料。本文采用电沉积方法制备了Ti/MnO₂催化电极，并用SEM对电极涂层进行了表征，利用循环伏安、阳极极化和塔菲尔图等电化学方法测试Ti/MnO₂电极的性能，以制备的Ti/MnO₂电极对甲醇进行电催化氧化，探究了电流大小、甲醇浓度、电解时间对甲醇电解率的影响。结果表明：Ti/MnO₂催化电极晶粒分布均匀，裂缝少，能够很好的覆盖钛基体，当电流强度控制在1mA，电解液浓度为0.4mg/mL，电解时间50min时，电极对甲醇的催化氧化活性最高，电解率达85.16%。

关键词: Ti/MnO₂电极, 电沉积, 催化氧化, 循环伏安法