Influence of Polyvinyl Alcohol on Structure and Property of PbO2 Electrode

doi:10.11902/1005.4537.2013.218

Journal of Chinese Society for Corrosion and protection

2015, Vol. 35

Issue (1): 81-85 DOI: 10.11902/1005.4537.2013.218

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Influence of Polyvinyl Alcohol on Structure and Property of PbO₂ Electrode

WANG Meiqing, YANG Weihua(

), CAI Chengjie, LIN Xiaoyan, FU Fang

College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China

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Abstract

Titanium based PbO₂ electrode was surface modified by electrodepositing in a polyvinyl alcohol (PVA) containing electrolyte, then its phase composition and microstructure was characterized by SEM and XRD. While the electrochemical properties of the modified electrode was examined by means of electrochemical impedance spectroscopy (EIS), linear potential sweep (LPV), degradation experiment of phenol and accelerated lifetime tests. Results show that the modified electrode has a high-dense structure composed of network-like PVA on mesh-like PbO₂. The surface modification process also results in decreasing the particle size and increasing the specific surface area of the film on electrode. Compared with the original PbO₂ electrode, the modified PbO₂electrode presents a relatively lower electrochemical impedance as well as a higher oxygen evolution reaction potential. Finally, the modified PbO₂ electrode exhibited higher electrocatalytic activity and longer service time. As an example, 96.9% of phenol in artificial waste water can be removed within 2 h by an electrocatalytic degradation process with a properly modified electrode PbO₂-PVA (0.6) and the service time of that electrode was ca 1.5 fold of the original one.

Key words: PbO₂ electrode polyvinyl alcohol electrocatalysis phenol

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	Meiqing WANG
	Weihua YANG
	Chengjie CAI
	Xiaoyan LIN
	Fang FU

Cite this article:

WANG Meiqing, YANG Weihua, CAI Chengjie, LIN Xiaoyan, FU Fang. Influence of Polyvinyl Alcohol on Structure and Property of PbO₂ Electrode. Journal of Chinese Society for Corrosion and protection, 2015, 35(1): 81-85.

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https://www.jcscp.org/EN/10.11902/1005.4537.2013.218 OR https://www.jcscp.org/EN/Y2015/V35/I1/81

Fig.1 SEM images of PbO₂ electrodes before (a) and after (b) modification with 0.6 g/L PVA

Fig.2 XRD patterns of PbO₂ electrodes before and after modification with 0.6 g/L PVA

Fig.3 EIS pluts of PbO₂ electrodes modified with different concentrations of PVA

Table 1 Fitted data of EIS of PbO₂ electrodes modified with different concentrations of PVA

Fig.4 Oxygen evolution polarization curves of PbO₂ electrodes modified with different concentrations of PVA

Fig.5 Degradation ratio of phnol on PbO₂ electrodes modified with different concentrations of PVA

Fig.6 Potential variations with time in accelerated life test

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