摘要
为了提高电极对臭氧生成反应的电催化活性,采用纳米复合电镀技术制备了TiO2改性PbO2电极.分别采用X射线衍射和X射线荧光光谱分析了其晶体结构和组分含量。将该电极用于电解法制备臭氧,并考察了电流密度、电镀极间距、电镀液pH值以及TiO2颗粒粒径对电极性能的影响.实验结果表明,改性后的PbO2电极使臭氧生成反应的电流效率由11.9%提高到了12.9%.电镀电流密度和电镀极间距的提高有利于提高电极催化活性.TiO2的掺杂会降低PbO2电极的晶胞粒径,有利于提高电极的电催化活性.
In order to improve the electrocatalytic properties of electrodes in electrochemical ozone production, PbO2-matrix composites containing nano-grade TiO2 as the dispersed phase were obtained on Ti substrate. The crystal structure and component content of the modified PbO2 electrodes were analyzed by XRD and XRF techniques and were applied to the electrochemical ozone production. In addition, the effects of different parameters such as current density, depth between electrodes, pH values of electroplating solution and the particle size of TiO2 on properties of the electrodes were investigated. Results show that the doping of TiO2 particles can improve the electrocatalytic properties of PbO2 electrodes by increasing the current efficiency from 11.9% to 12. 9%. The current density and depth between electrodes during electroplating can help to improve electrocatalytic properties of the modified electrodes.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2008年第6期781-784,789,共5页
Materials Science and Technology
基金
国家自然科学基金资助项目(50278022)
