摘要
采用电沉积法制备了稀土铒改性钛基PbO_2电极,用SEM、EDS和XRD技术分析了表面物相和结构,用EIS、线性极化扫描、荧光光谱分析和苯酚降解实验对其性能进行了表征。结果表明,稀土铒改性钛基PbO_2电极镀层的结构主要为β-PbO_2晶型,其晶粒明显细化,比表面积增大;电致生成羟基自由基的能力是未改性电极的2.3倍;改性电极具有更小的电化学反应电阻和更高的阳极析氧过电位。苯酚降解实验表明,稀土铒掺杂改性明显提高了钛基PbO_2电极的电催化性能,2h降解率达91.8%。
Ti-supported PbO2 electrode doped with rare earth Er was prepared by electrodeposition method. The phase composition and microstructure of PbO2 electrodes were characterized by SEM, EDS and XRD. At the same time, EIS, VA, FP analysis and phenol degradation experiments were applied to characterize the electrodes＇ electrochemical properties. Results show that the Er-PbO2 coating is mainly composed of/3-PbO2; Er can decrease the particle size and increase its surface area; the fluorescent inten- sity of Er-PbO2 electrode is 2.3 times higher than that of PbO2 electrode. Comparing with the undoped PbO2 electrode, the Er-PbO2 electrode presents a relatively lower electrochemistry response resistance as well as a higher oxygen evolution reaction potential. Phenol degradation experiments show that Er- PbO2 electrode can enhance the electrocatalvtic activity and 91.8% of phenol can be removed at 2 h.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2012年第4期367-371,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金21103055
中央高校基本科研业务费专项资金JB-ZR1139资助项目~~
关键词
无机非金属材料
PBO2电极
稀土铒
电催化
inorganic non-metallic materials, Pb02 electrode, rare earth Er, electro-catalysis
