Electro-Catalytic Properties of β-PbO₂/Sb-SnO₂/Ti Electrode on Phenol Oxidation

Authors

Peng LI, School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 22116, Jiangsu, China;
Yue-min ZHAO, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 22116, Jiangsu, China;
Li-zhang WANG, School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 22116, Jiangsu, China;Follow
Yan-le ZHANG, Xuzhou engineering consulting center, Xuzhou 22116, Jiangsu, China;
Zhao-qing LU, School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 22116, Jiangsu, China;

Corresponding Author

Li-zhang WANG(wlzh0731@126.com)

Abstract

The combination technology of brush pyrolysis and electroplating was employed in the preparation of β-PbO₂/Sb-SnO₂/Ti electrode. X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) results showed that the Sb-SnO₂ as an interlayer would restrain the formation of lead fluoride and the crystallization degree on the electrode surface could be as high as 100%. The grain size was calculated by Scherrer formula to be 25.2 nm and the agglomeration of lead dioxide was effectively eliminated. The potential span of diffusion control phase, oxygen evolution potential, Tafel slope for the β-PbO₂/Sb-SnO₂/Ti electrode during the polarization were 1.85 ~ 2.15 V, 2.08 V and 0.84, respectively, which exhibited much better electrochemical properties as compared with those of the β-PbO₂/Ti electrode with the values of 1.40 ~ 1.80 V, 1.75 V and 0.36, respectively. Furthermore, the β-PbO₂/Sb-SnO₂/Ti and β-PbO₂/Ti electrodes were taken as anodes participating in the electrocatalysis degradation of phenol simulated wastewater under current density 9 mA·cm^-2 within 240 min. Experimental results revealed that the efficiencies of chemical oxygen demand (COD) removal and instant current efficiency (ICE) during phenol degradation were 90.1% and 63.28% for the β-PbO₂/Sb-SnO₂/Ti electrode, while 66.9% and 44.96% for the β-PbO₂/Ti electrode. Ultimately, the accelerated life test was performed to evaluate the service time of β-PbO₂/Sb-SnO₂/Ti. The results presented that the industrial life of β-PbO₂/Sb-SnO₂/Ti was 8.6a, which is 10 times longer than that of β-PbO₂/Ti,suggesting that β-PbO₂/Sb-SnO₂/Ti would have a relatively high engineering application value.

Graphical Abstract

Keywords

stannic and antimony oxides interlayer, β-PbO2/Ti, polarization curve, instant current efficiency, accelerated life test

DOI Link

https://doi.org/10.13208/j.electrochem.131021

Publication Date

2014-10-28

Online Available Date

2013-12-10

Revised Date

2013-12-05

Received Date

2013-10-21

Recommended Citation

Peng LI, Yue-min ZHAO, Li-zhang WANG, Yan-le ZHANG, Zhao-qing LU. Electro-Catalytic Properties of β-PbO₂/Sb-SnO₂/Ti Electrode on Phenol Oxidation[J]. Journal of Electrochemistry, 2014 , 20(5): 493-498.
DOI: 10.13208/j.electrochem.131021
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss5/14