摘要
采用热分解和电沉积的方法制备了稀土元素Y掺杂Ti/SnO2+MnOx/PbO2耐酸阳极。用XRD、SEM表征了电极的物相和表面形貌,用CV、EIS测定了电极的电化学性能,并研究了Y掺杂对电极在强酸性溶液中使用寿命的影响。结果表明:Y以Y2O3的形式与SnO2形成半导体固溶体,使电极在高电流密度(4A/cm2)下的预期使用寿命达到70h;同时该电极的析氧电位高达2.1V,且电极表面呈蘑菇状,电催化性较好,Ti/SnO2+Y2O3+MnOx/PbO2电极是一种较理想的耐酸阳极材料。
Acid-proof Ti/SnO2＋MnOx/PbO2 anode doped with rare earth Y was prepared by thermal decomposition method and electrodeposited method. The surface characterization of the electrode was characterized by scanning electron microscopy（SEM） and the element composition of layers was analyzed with X-ray Diffraction（XRD）. The electrode electrochemical properties were analyzed with Cyclic Voltammogram （CV） and Electrochemical Impedance Spectroscopic （EIS）.The influence of Y doping on the service life of the electrode in strong acid solution was emphatically studied. The results indicated that the semiconductive solid solution was formed between Y203 and SnO2, which maked the service life of electrode reaching 70 h in high electric density（4 A/cm^2）; At the same time the oxygen evolution reaction（OER） potential of this electrode reached 2.1 V. The rougher of the surface was, the better its electric catalytic properties were. Ti/SnO2＋MnOx/PbO2 electrode is an ideal acid-proof anode material.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第5期821-825,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(20771080)
山西省自然科学基金(20031024)
